Subtract 56/49 from 7/40, Solve 7/40

Subtract 56/49 from 7/40

1^st number: 7/40, 2^nd number: 1 7/49

7/40 - 56/49 is -271/280.

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

Next, find the equivalent fraction of both fractional numbers with denominator 1960
For the 1st fraction, since 40 × 49 = 1960,
7/40 = 7 × 49/40 × 49 = 343/1960
Likewise, for the 2nd fraction, since 49 × 40 = 1960,
56/49 = 56 × 40/49 × 40 = 2240/1960
Subtract the two like fractions:
343/1960 - 2240/1960 = 343 - 2240/1960 = -1897/1960
After reducing the fraction, the answer is -271/280

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