Subtract 15/49 from 12/40
12/40 - 15/49 is -3/490.
Steps for subtracting fractions
- 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,
12/40 = 12 × 49/40 × 49 = 588/1960 - Likewise, for the 2nd fraction, since 49 × 40 = 1960,
15/49 = 15 × 40/49 × 40 = 600/1960 - Subtract the two like fractions:
588/1960 - 600/1960 = 588 - 600/1960 = -12/1960 - After reducing the fraction, the answer is -3/490
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