Subtract 15/42 from 20/64
20/64 - 15/42 is -5/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 42 is 1344
Next, find the equivalent fraction of both fractional numbers with denominator 1344 - For the 1st fraction, since 64 × 21 = 1344,
20/64 = 20 × 21/64 × 21 = 420/1344 - Likewise, for the 2nd fraction, since 42 × 32 = 1344,
15/42 = 15 × 32/42 × 32 = 480/1344 - Subtract the two like fractions:
420/1344 - 480/1344 = 420 - 480/1344 = -60/1344 - After reducing the fraction, the answer is -5/112
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