Subtract 18/49 from 8/40, Solve 8/40

Subtract 18/49 from 8/40

8/40 - 18/49 is -41/245.

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,
8/40 = 8 × 49/40 × 49 = 392/1960
Likewise, for the 2nd fraction, since 49 × 40 = 1960,
18/49 = 18 × 40/49 × 40 = 720/1960
Subtract the two like fractions:
392/1960 - 720/1960 = 392 - 720/1960 = -328/1960
After reducing the fraction, the answer is -41/245

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