Answers

Subtract 42/63 from 28/20

1^st number: 1 8/20, 2^nd number: 42/63

28/20 - 42/63 is 11/15.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 63 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 20 × 63 = 1260,
   28/20 = 28 × 63/20 × 63 = 1764/1260
3. Likewise, for the 2nd fraction, since 63 × 20 = 1260,
   42/63 = 42 × 20/63 × 20 = 840/1260
4. Subtract the two like fractions:
   1764/1260 - 840/1260 = 1764 - 840/1260 = 924/1260
5. After reducing the fraction, the answer is 11/15

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