Subtract 42/12 from 60/70, Solve 60/70

Subtract 42/12 from 60/70

1^st number: 60/70, 2^nd number: 3 6/12

60/70 - 42/12 is -37/14.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 70 × 6 = 420,
60/70 = 60 × 6/70 × 6 = 360/420
Likewise, for the 2nd fraction, since 12 × 35 = 420,
42/12 = 42 × 35/12 × 35 = 1470/420
Subtract the two like fractions:
360/420 - 1470/420 = 360 - 1470/420 = -1110/420
After reducing the fraction, the answer is -37/14

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