Subtract 80/84 from 27/15, Solve 1 12/15

Subtract 80/84 from 27/15

1^st number: 1 12/15, 2^nd number: 80/84

27/15 - 80/84 is 89/105.

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
For the 1st fraction, since 15 × 28 = 420,
27/15 = 27 × 28/15 × 28 = 756/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
80/84 = 80 × 5/84 × 5 = 400/420
Subtract the two like fractions:
756/420 - 400/420 = 756 - 400/420 = 356/420
After reducing the fraction, the answer is 89/105

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