Answers

The simplest form of -687/120 is -229/40.

Steps to simplifying fractions

1. Find the GCD (or HCF) of the absolute values of both numerator and denominator
   GCD of 687 and 120 is 3
2. Divide both the numerator and denominator by the GCD
   -687 ÷ 3/120 ÷ 3
3. Reduced fraction: -229/40
   Therefore, -687/120 simplified to lowest terms is -229/40.

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