Subtract 12/40 from 54/49, Solve 1 5/49

Subtract 12/40 from 54/49

1^st number: 1 5/49, 2^nd number: 12/40

54/49 - 12/40 is 393/490.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 40 is 1960

Next, find the equivalent fraction of both fractional numbers with denominator 1960
For the 1st fraction, since 49 × 40 = 1960,
54/49 = 54 × 40/49 × 40 = 2160/1960
Likewise, for the 2nd fraction, since 40 × 49 = 1960,
12/40 = 12 × 49/40 × 49 = 588/1960
Subtract the two like fractions:
2160/1960 - 588/1960 = 2160 - 588/1960 = 1572/1960
After reducing the fraction, the answer is 393/490

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