Subtract 45/7 from 90/12, Solve 7 6/12

Subtract 45/7 from 90/12

1^st number: 7 6/12, 2^nd number: 6 3/7

90/12 - 45/7 is 15/14.

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,
90/12 = 90 × 7/12 × 7 = 630/84
Likewise, for the 2nd fraction, since 7 × 12 = 84,
45/7 = 45 × 12/7 × 12 = 540/84
Subtract the two like fractions:
630/84 - 540/84 = 630 - 540/84 = 90/84
After reducing the fraction, the answer is 15/14
In mixed form: 11/14

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