Answers

Subtract 21/80 from 56/84

56/84 - 21/80 is 97/240.

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,
   56/84 = 56 × 20/84 × 20 = 1120/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   21/80 = 21 × 21/80 × 21 = 441/1680
4. Subtract the two like fractions:
   1120/1680 - 441/1680 = 1120 - 441/1680 = 679/1680
5. After reducing the fraction, the answer is 97/240

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