Answers

The simplest form of -400/378 is -200/189.

Steps to simplifying fractions

1. Find the GCD (or HCF) of the absolute values of both numerator and denominator
   GCD of 400 and 378 is 2
2. Divide both the numerator and denominator by the GCD
   -400 ÷ 2/378 ÷ 2
3. Reduced fraction: -200/189
   Therefore, -400/378 simplified to lowest terms is -200/189.

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