Subtract 6/63 from 90/7, Solve 12 6/7

Subtract 6/63 from 90/7

1^st number: 12 6/7, 2^nd number: 6/63

90/7 - 6/63 is 268/21.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 63 is 63

Next, find the equivalent fraction of both fractional numbers with denominator 63
For the 1st fraction, since 7 × 9 = 63,
90/7 = 90 × 9/7 × 9 = 810/63
Likewise, for the 2nd fraction, since 63 × 1 = 63,
6/63 = 6 × 1/63 × 1 = 6/63
Subtract the two like fractions:
810/63 - 6/63 = 810 - 6/63 = 804/63
After reducing the fraction, the answer is 268/21
In mixed form: 1216/21

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