Subtract 10/7 from 40/12, Solve 3 4/12

Subtract 10/7 from 40/12

1^st number: 3 4/12, 2^nd number: 1 3/7

40/12 - 10/7 is 40/21.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 12 × 7 = 84,
40/12 = 40 × 7/12 × 7 = 280/84
Likewise, for the 2nd fraction, since 7 × 12 = 84,
10/7 = 10 × 12/7 × 12 = 120/84
Subtract the two like fractions:
280/84 - 120/84 = 280 - 120/84 = 160/84
After reducing the fraction, the answer is 40/21
In mixed form: 119/21

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