Answers

The simplest form of -138/90 is -23/15.

Steps to simplifying fractions

1. Find the GCD (or HCF) of the absolute values of both numerator and denominator
   GCD of 138 and 90 is 6
2. Divide both the numerator and denominator by the GCD
   -138 ÷ 6/90 ÷ 6
3. Reduced fraction: -23/15
   Therefore, -138/90 simplified to lowest terms is -23/15.

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