Answers

The simplest form of -217/420 is -31/60.

Steps to simplifying fractions

1. Find the GCD (or HCF) of the absolute values of both numerator and denominator
   GCD of 217 and 420 is 7
2. Divide both the numerator and denominator by the GCD
   -217 ÷ 7/420 ÷ 7
3. Reduced fraction: -31/60
   Therefore, -217/420 simplified to lowest terms is -31/60.

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