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diff --git a/tim/prune/jpeg/drew/Rational.java b/tim/prune/jpeg/drew/Rational.java
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+++ b/tim/prune/jpeg/drew/Rational.java
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+package tim.prune.jpeg.drew;
+
+/**
+ * Immutable class for holding a rational number without loss of precision.
+ * Based on Drew Noakes' Metadata extractor at http://drewnoakes.com
+ */
+public class Rational
+{
+	/** Holds the numerator */
+	private final int _numerator;
+
+	/** Holds the denominator */
+	private final int _denominator;
+
+	/**
+	 * Constructor
+	 * @param inNumerator numerator of fraction (upper number)
+	 * @param inDenominator denominator of fraction (lower number)
+	 */
+	public Rational(int inNumerator, int inDenominator)
+	{
+		// Could throw exception if denominator is zero
+		_numerator = inNumerator;
+		_denominator = inDenominator;
+	}
+
+
+	/**
+	 * @return the value of the specified number as a <code>double</code>.
+	 * This may involve rounding.
+	 */
+	public double doubleValue()
+	{
+		if (_denominator == 0) return 0.0;
+		return (double)_numerator / (double)_denominator;
+	}
+
+	/**
+	 * @return the value of the specified number as an <code>int</code>.
+	 * This may involve rounding or truncation.
+	 */
+	public final int intValue()
+	{
+		if (_denominator == 0) return 0;
+		return _numerator / _denominator;
+	}
+
+	/**
+	 * @return the denominator.
+	 */
+	public final int getDenominator()
+	{
+		return _denominator;
+	}
+
+	/**
+	 * @return the numerator.
+	 */
+	public final int getNumerator()
+	{
+		return _numerator;
+	}
+
+	/**
+	 * Checks if this rational number is an Integer, either positive or negative
+	 * @return true if an integer
+	 */
+	public boolean isInteger()
+	{
+		// number is integer if the denominator is 1, or if the remainder is zero
+		return (_denominator == 1
+			|| (_denominator != 0 && (_numerator % _denominator == 0)));
+	}
+
+
+	/**
+	 * @return a string representation of the object of form <code>numerator/denominator</code>.
+	 */
+	public String toString()
+	{
+		return "" + _numerator + "/" + _denominator;
+	}
+
+
+	/**
+	 * Compares two <code>Rational</code> instances, returning true if they are equal
+	 * @param inOther the Rational to compare this instance to.
+	 * @return true if instances are equal, otherwise false.
+	 */
+	public boolean equals(Rational inOther)
+	{
+		// Could also attempt to simplify fractions to lowest common denominator before compare
+		return _numerator == inOther._numerator && _denominator == inOther._denominator;
+	}
+}
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