Answers

The simplest form of -405/980 is -81/196.

Steps to simplifying fractions

1. Find the GCD (or HCF) of the absolute values of both numerator and denominator
   GCD of 405 and 980 is 5
2. Divide both the numerator and denominator by the GCD
   -405 ÷ 5/980 ÷ 5
3. Reduced fraction: -81/196
   Therefore, -405/980 simplified to lowest terms is -81/196.

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