Answers

The simplest form of -664/1400 is -83/175.

Steps to simplifying fractions

1. Find the GCD (or HCF) of the absolute values of both numerator and denominator
   GCD of 664 and 1400 is 8
2. Divide both the numerator and denominator by the GCD
   -664 ÷ 8/1400 ÷ 8
3. Reduced fraction: -83/175
   Therefore, -664/1400 simplified to lowest terms is -83/175.

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