Answers

Subtract 70/20 from 28/63

1^st number: 28/63, 2^nd number: 3 10/20

28/63 - 70/20 is -55/18.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 20 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 63 × 20 = 1260,
   28/63 = 28 × 20/63 × 20 = 560/1260
3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
   70/20 = 70 × 63/20 × 63 = 4410/1260
4. Subtract the two like fractions:
   560/1260 - 4410/1260 = 560 - 4410/1260 = -3850/1260
5. After reducing the fraction, the answer is -55/18

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