Answers

The simplest form of -455/400 is -91/80.

Steps to simplifying fractions

1. Find the GCD (or HCF) of the absolute values of both numerator and denominator
   GCD of 455 and 400 is 5
2. Divide both the numerator and denominator by the GCD
   -455 ÷ 5/400 ÷ 5
3. Reduced fraction: -91/80
   Therefore, -455/400 simplified to lowest terms is -91/80.

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