Subtract 42/49 from 2/40, Solve 2/40

Subtract 42/49 from 2/40

2/40 - 42/49 is -113/140.

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,
2/40 = 2 × 49/40 × 49 = 98/1960
Likewise, for the 2nd fraction, since 49 × 40 = 1960,
42/49 = 42 × 40/49 × 40 = 1680/1960
Subtract the two like fractions:
98/1960 - 1680/1960 = 98 - 1680/1960 = -1582/1960
After reducing the fraction, the answer is -113/140

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