Answers

Subtract 70/15 from 42/20

1^st number: 2 2/20, 2^nd number: 4 10/15

42/20 - 70/15 is -77/30.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 15 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 20 × 3 = 60,
   42/20 = 42 × 3/20 × 3 = 126/60
3. Likewise, for the 2nd fraction, since 15 × 4 = 60,
   70/15 = 70 × 4/15 × 4 = 280/60
4. Subtract the two like fractions:
   126/60 - 280/60 = 126 - 280/60 = -154/60
5. After reducing the fraction, the answer is -77/30

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