Answers

Subtract 8/80 from 5/84

5/84 - 8/80 is -17/420.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 84 × 20 = 1680,
   5/84 = 5 × 20/84 × 20 = 100/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   8/80 = 8 × 21/80 × 21 = 168/1680
4. Subtract the two like fractions:
   100/1680 - 168/1680 = 100 - 168/1680 = -68/1680
5. After reducing the fraction, the answer is -17/420

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