Subtract 16/35 from 15/84, Solve 15/84

Subtract 16/35 from 15/84

15/84 - 16/35 is -39/140.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 35 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 84 × 5 = 420,
15/84 = 15 × 5/84 × 5 = 75/420
Likewise, for the 2nd fraction, since 35 × 12 = 420,
16/35 = 16 × 12/35 × 12 = 192/420
Subtract the two like fractions:
75/420 - 192/420 = 75 - 192/420 = -117/420
After reducing the fraction, the answer is -39/140

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