Subtract 49/27 from 18/40, Solve 18/40

Subtract 49/27 from 18/40

1^st number: 18/40, 2^nd number: 1 22/27

18/40 - 49/27 is -737/540.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 27 is 1080

Next, find the equivalent fraction of both fractional numbers with denominator 1080
For the 1st fraction, since 40 × 27 = 1080,
18/40 = 18 × 27/40 × 27 = 486/1080
Likewise, for the 2nd fraction, since 27 × 40 = 1080,
49/27 = 49 × 40/27 × 40 = 1960/1080
Subtract the two like fractions:
486/1080 - 1960/1080 = 486 - 1960/1080 = -1474/1080
After reducing the fraction, the answer is -737/540

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