Answers

The simplest form of -18/15 is -6/5.

Steps to simplifying fractions

1. Find the GCD (or HCF) of the absolute values of both numerator and denominator
   GCD of 18 and 15 is 3
2. Divide both the numerator and denominator by the GCD
   -18 ÷ 3/15 ÷ 3
3. Reduced fraction: -6/5
   Therefore, -18/15 simplified to lowest terms is -6/5.

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