Subtract 20/63 from 70/54, Solve 1 16/54

Subtract 20/63 from 70/54

1^st number: 1 16/54, 2^nd number: 20/63

70/54 - 20/63 is 185/189.

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,
70/54 = 70 × 7/54 × 7 = 490/378
Likewise, for the 2nd fraction, since 63 × 6 = 378,
20/63 = 20 × 6/63 × 6 = 120/378
Subtract the two like fractions:
490/378 - 120/378 = 490 - 120/378 = 370/378
After reducing the fraction, the answer is 185/189

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