Answers

The simplest form of -4/840 is -1/210.

Steps to simplifying fractions

1. Find the GCD (or HCF) of the absolute values of both numerator and denominator
   GCD of 4 and 840 is 4
2. Divide both the numerator and denominator by the GCD
   -4 ÷ 4/840 ÷ 4
3. Reduced fraction: -1/210
   Therefore, -4/840 simplified to lowest terms is -1/210.

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