Answers

The simplest form of -128/42 is -64/21.

Steps to simplifying fractions

1. Find the GCD (or HCF) of the absolute values of both numerator and denominator
   GCD of 128 and 42 is 2
2. Divide both the numerator and denominator by the GCD
   -128 ÷ 2/42 ÷ 2
3. Reduced fraction: -64/21
   Therefore, -128/42 simplified to lowest terms is -64/21.

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