Subtract 15/10 from 4/84, Solve 4/84

Subtract 15/10 from 4/84

1^st number: 4/84, 2^nd number: 1 5/10

4/84 - 15/10 is -61/42.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 10 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 84 × 5 = 420,
4/84 = 4 × 5/84 × 5 = 20/420
Likewise, for the 2nd fraction, since 10 × 42 = 420,
15/10 = 15 × 42/10 × 42 = 630/420
Subtract the two like fractions:
20/420 - 630/420 = 20 - 630/420 = -610/420
After reducing the fraction, the answer is -61/42

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