Subtract 27/42 from 20/15, Solve 1 5/15

Subtract 27/42 from 20/15

1^st number: 1 5/15, 2^nd number: 27/42

20/15 - 27/42 is 29/42.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 15 × 14 = 210,
20/15 = 20 × 14/15 × 14 = 280/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
27/42 = 27 × 5/42 × 5 = 135/210
Subtract the two like fractions:
280/210 - 135/210 = 280 - 135/210 = 145/210
After reducing the fraction, the answer is 29/42

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