Subtract 40/49 from 42/56
42/56 - 40/49 is -13/196.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 49 is 392
Next, find the equivalent fraction of both fractional numbers with denominator 392 - For the 1st fraction, since 56 × 7 = 392,
42/56 = 42 × 7/56 × 7 = 294/392 - Likewise, for the 2nd fraction, since 49 × 8 = 392,
40/49 = 40 × 8/49 × 8 = 320/392 - Subtract the two like fractions:
294/392 - 320/392 = 294 - 320/392 = -26/392 - After reducing the fraction, the answer is -13/196
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