Subtract 30/63 from 90/54, Solve 1 36/54

Subtract 30/63 from 90/54

1^st number: 1 36/54, 2^nd number: 30/63

90/54 - 30/63 is 25/21.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 63 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 54 × 7 = 378,
90/54 = 90 × 7/54 × 7 = 630/378
Likewise, for the 2nd fraction, since 63 × 6 = 378,
30/63 = 30 × 6/63 × 6 = 180/378
Subtract the two like fractions:
630/378 - 180/378 = 630 - 180/378 = 450/378
After reducing the fraction, the answer is 25/21
In mixed form: 14/21

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