Answers

Subtract 63/84 from 20/15

1^st number: 1 5/15, 2^nd number: 63/84

20/15 - 63/84 is 7/12.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 15 × 28 = 420,
   20/15 = 20 × 28/15 × 28 = 560/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   63/84 = 63 × 5/84 × 5 = 315/420
4. Subtract the two like fractions:
   560/420 - 315/420 = 560 - 315/420 = 245/420
5. After reducing the fraction, the answer is 7/12

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