Answers

Subtract 60/20 from 15/84

1^st number: 15/84, 2^nd number: 3 0/20

15/84 - 60/20 is -79/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   15/84 = 15 × 5/84 × 5 = 75/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   60/20 = 60 × 21/20 × 21 = 1260/420
4. Subtract the two like fractions:
   75/420 - 1260/420 = 75 - 1260/420 = -1185/420
5. After reducing the fraction, the answer is -79/28

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