diff --git a/commons-numbers-complex/src/main/java/org/apache/commons/numbers/complex/Complex.java b/commons-numbers-complex/src/main/java/org/apache/commons/numbers/complex/Complex.java
index 26bf454..4e9022e 100644
--- a/commons-numbers-complex/src/main/java/org/apache/commons/numbers/complex/Complex.java
+++ b/commons-numbers-complex/src/main/java/org/apache/commons/numbers/complex/Complex.java
@@ -20,7 +20,7 @@
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
-
+import org.apache.commons.numbers.core.Precision;
 /**
  * Representation of a Complex number, i.e. a number which has both a
  * real and imaginary part.
diff --git a/commons-numbers-complex/src/main/java/org/apache/commons/numbers/complex/Precision.java b/commons-numbers-complex/src/main/java/org/apache/commons/numbers/complex/Precision.java
deleted file mode 100644
index 529f8ff..0000000
--- a/commons-numbers-complex/src/main/java/org/apache/commons/numbers/complex/Precision.java
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.commons.numbers.complex;
-
-/**
- * Utilities for comparing numbers.
- */
-class Precision {
-    /** Offset to order signed double numbers lexicographically. */
-    private static final long SGN_MASK = 0x8000000000000000L;
-    /** Positive zero bits. */
-    private static final long POSITIVE_ZERO_DOUBLE_BITS = Double.doubleToRawLongBits(+0.0);
-    /** Negative zero bits. */
-    private static final long NEGATIVE_ZERO_DOUBLE_BITS = Double.doubleToRawLongBits(-0.0);
-
-    /**
-     * Private constructor.
-     */
-    private Precision() {}
-
-    /**
-     * Returns {@code true} if there is no double value strictly between the
-     * arguments or the difference between them is within the range of allowed
-     * error (inclusive). Returns {@code false} if either of the arguments
-     * is NaN.
-     *
-     * @param x First value.
-     * @param y Second value.
-     * @param eps Amount of allowed absolute error.
-     * @return {@code true} if the values are two adjacent floating point
-     * numbers or they are within range of each other.
-     */
-    public static boolean equals(double x, double y, double eps) {
-        return equals(x, y, 1) || Math.abs(y - x) <= eps;
-    }
-
-    /**
-     * Returns {@code true} if there is no double value strictly between the
-     * arguments or the relative difference between them is less than or equal
-     * to the given tolerance. Returns {@code false} if either of the arguments
-     * is NaN.
-     *
-     * @param x First value.
-     * @param y Second value.
-     * @param eps Amount of allowed relative error.
-     * @return {@code true} if the values are two adjacent floating point
-     * numbers or they are within range of each other.
-     */
-    public static boolean equalsWithRelativeTolerance(double x, double y, double eps) {
-        if (equals(x, y, 1)) {
-            return true;
-        }
-
-        final double absoluteMax = Math.max(Math.abs(x), Math.abs(y));
-        final double relativeDifference = Math.abs((x - y) / absoluteMax);
-
-        return relativeDifference <= eps;
-    }
-
-    /**
-     * Returns true if the arguments are equal or within the range of allowed
-     * error (inclusive).
-     * <p>
-     * Two float numbers are considered equal if there are {@code (maxUlps - 1)}
-     * (or fewer) floating point numbers between them, i.e. two adjacent
-     * floating point numbers are considered equal.
-     * </p>
-     * <p>
-     * Adapted from <a
-     * href="http://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/">
-     * Bruce Dawson</a>. Returns {@code false} if either of the arguments is NaN.
-     * </p>
-     *
-     * @param x first value
-     * @param y second value
-     * @param maxUlps {@code (maxUlps - 1)} is the number of floating point
-     * values between {@code x} and {@code y}.
-     * @return {@code true} if there are fewer than {@code maxUlps} floating
-     * point values between {@code x} and {@code y}.
-     */
-    public static boolean equals(final double x, final double y, final int maxUlps) {
-
-        final long xInt = Double.doubleToRawLongBits(x);
-        final long yInt = Double.doubleToRawLongBits(y);
-
-        final boolean isEqual;
-        if (((xInt ^ yInt) & SGN_MASK) == 0l) {
-            // number have same sign, there is no risk of overflow
-            isEqual = Math.abs(xInt - yInt) <= maxUlps;
-        } else {
-            // number have opposite signs, take care of overflow
-            final long deltaPlus;
-            final long deltaMinus;
-            if (xInt < yInt) {
-                deltaPlus  = yInt - POSITIVE_ZERO_DOUBLE_BITS;
-                deltaMinus = xInt - NEGATIVE_ZERO_DOUBLE_BITS;
-            } else {
-                deltaPlus  = xInt - POSITIVE_ZERO_DOUBLE_BITS;
-                deltaMinus = yInt - NEGATIVE_ZERO_DOUBLE_BITS;
-            }
-
-            if (deltaPlus > maxUlps) {
-                isEqual = false;
-            } else {
-                isEqual = deltaMinus <= (maxUlps - deltaPlus);
-            }
-
-        }
-
-        return isEqual && !Double.isNaN(x) && !Double.isNaN(y);
-
-    }
-}
diff --git a/commons-numbers-complex/src/test/java/org/apache/commons/numbers/complex/TestUtils.java b/commons-numbers-complex/src/test/java/org/apache/commons/numbers/complex/TestUtils.java
index 70dc4c1..f59da64 100644
--- a/commons-numbers-complex/src/test/java/org/apache/commons/numbers/complex/TestUtils.java
+++ b/commons-numbers-complex/src/test/java/org/apache/commons/numbers/complex/TestUtils.java
@@ -24,6 +24,7 @@
 import java.io.ObjectOutputStream;
 
 import org.apache.commons.numbers.complex.Complex;
+import org.apache.commons.numbers.core.Precision;
 
 import org.junit.Assert;