Subtract 42/15 from 2/84, Solve 2/84

Subtract 42/15 from 2/84

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

2/84 - 42/15 is -583/210.

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,
2/84 = 2 × 5/84 × 5 = 10/420
Likewise, for the 2nd fraction, since 15 × 28 = 420,
42/15 = 42 × 28/15 × 28 = 1176/420
Subtract the two like fractions:
10/420 - 1176/420 = 10 - 1176/420 = -1166/420
After reducing the fraction, the answer is -583/210

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