Answers

Subtract 5/84 from 20/80

20/80 - 5/84 is 4/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 84 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 80 × 21 = 1680,
   20/80 = 20 × 21/80 × 21 = 420/1680
3. Likewise, for the 2nd fraction, since 84 × 20 = 1680,
   5/84 = 5 × 20/84 × 20 = 100/1680
4. Subtract the two like fractions:
   420/1680 - 100/1680 = 420 - 100/1680 = 320/1680
5. After reducing the fraction, the answer is 4/21

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