Subtract 27/8 from 15/84, Solve 15/84

Subtract 27/8 from 15/84

1^st number: 15/84, 2^nd number: 3 3/8

15/84 - 27/8 is -179/56.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 8 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 84 × 2 = 168,
15/84 = 15 × 2/84 × 2 = 30/168
Likewise, for the 2nd fraction, since 8 × 21 = 168,
27/8 = 27 × 21/8 × 21 = 567/168
Subtract the two like fractions:
30/168 - 567/168 = 30 - 567/168 = -537/168
After reducing the fraction, the answer is -179/56

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