Subtract 4/63 from 20/15, Solve 1 5/15

Subtract 4/63 from 20/15

1^st number: 1 5/15, 2^nd number: 4/63

20/15 - 4/63 is 80/63.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 63 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 15 × 21 = 315,
20/15 = 20 × 21/15 × 21 = 420/315
Likewise, for the 2nd fraction, since 63 × 5 = 315,
4/63 = 4 × 5/63 × 5 = 20/315
Subtract the two like fractions:
420/315 - 20/315 = 420 - 20/315 = 400/315
After reducing the fraction, the answer is 80/63
In mixed form: 117/63

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