Subtract 15/20 from 40/49, Solve 40/49

Subtract 15/20 from 40/49

40/49 - 15/20 is 13/196.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 20 is 980

Next, find the equivalent fraction of both fractional numbers with denominator 980
For the 1st fraction, since 49 × 20 = 980,
40/49 = 40 × 20/49 × 20 = 800/980
Likewise, for the 2nd fraction, since 20 × 49 = 980,
15/20 = 15 × 49/20 × 49 = 735/980
Subtract the two like fractions:
800/980 - 735/980 = 800 - 735/980 = 65/980
After reducing the fraction, the answer is 13/196

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