Answers

Subtract 42/80 from 56/21

1^st number: 2 14/21, 2^nd number: 42/80

56/21 - 42/80 is 257/120.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 21 × 80 = 1680,
   56/21 = 56 × 80/21 × 80 = 4480/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   42/80 = 42 × 21/80 × 21 = 882/1680
4. Subtract the two like fractions:
   4480/1680 - 882/1680 = 4480 - 882/1680 = 3598/1680
5. After reducing the fraction, the answer is 257/120
6. In mixed form: 217/120

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