Subtract 45/54 from 90/63, Solve 1 27/63

Subtract 45/54 from 90/63

1^st number: 1 27/63, 2^nd number: 45/54

90/63 - 45/54 is 25/42.

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

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 63 × 6 = 378,
90/63 = 90 × 6/63 × 6 = 540/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
45/54 = 45 × 7/54 × 7 = 315/378
Subtract the two like fractions:
540/378 - 315/378 = 540 - 315/378 = 225/378
After reducing the fraction, the answer is 25/42

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