Subtract 45/15 from 27/84, Solve 27/84

Subtract 45/15 from 27/84

1^st number: 27/84, 2^nd number: 3 0/15

27/84 - 45/15 is -75/28.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 15 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 84 × 5 = 420,
27/84 = 27 × 5/84 × 5 = 135/420
Likewise, for the 2nd fraction, since 15 × 28 = 420,
45/15 = 45 × 28/15 × 28 = 1260/420
Subtract the two like fractions:
135/420 - 1260/420 = 135 - 1260/420 = -1125/420
After reducing the fraction, the answer is -75/28

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