Subtract 70/63 from 90/36, Solve 2 18/36

Subtract 70/63 from 90/36

1^st number: 2 18/36, 2^nd number: 1 7/63

90/36 - 70/63 is 25/18.

Find the least common denominator or LCM of the two denominators:
LCM of 36 and 63 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 36 × 7 = 252,
90/36 = 90 × 7/36 × 7 = 630/252
Likewise, for the 2nd fraction, since 63 × 4 = 252,
70/63 = 70 × 4/63 × 4 = 280/252
Subtract the two like fractions:
630/252 - 280/252 = 630 - 280/252 = 350/252
After reducing the fraction, the answer is 25/18
In mixed form: 17/18

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