Subtract 90/12 from 72/35, Solve 2 2/35

Subtract 90/12 from 72/35

1^st number: 2 2/35, 2^nd number: 7 6/12

72/35 - 90/12 is -381/70.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 12 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 35 × 12 = 420,
72/35 = 72 × 12/35 × 12 = 864/420
Likewise, for the 2nd fraction, since 12 × 35 = 420,
90/12 = 90 × 35/12 × 35 = 3150/420
Subtract the two like fractions:
864/420 - 3150/420 = 864 - 3150/420 = -2286/420
After reducing the fraction, the answer is -381/70

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