Answers

The simplest form of -504/405 is -56/45.

Steps to simplifying fractions

1. Find the GCD (or HCF) of the absolute values of both numerator and denominator
   GCD of 504 and 405 is 9
2. Divide both the numerator and denominator by the GCD
   -504 ÷ 9/405 ÷ 9
3. Reduced fraction: -56/45
   Therefore, -504/405 simplified to lowest terms is -56/45.

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