Subtract 4/64 from 20/42
20/42 - 4/64 is 139/336.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 64 is 1344
Next, find the equivalent fraction of both fractional numbers with denominator 1344 - For the 1st fraction, since 42 × 32 = 1344,
20/42 = 20 × 32/42 × 32 = 640/1344 - Likewise, for the 2nd fraction, since 64 × 21 = 1344,
4/64 = 4 × 21/64 × 21 = 84/1344 - Subtract the two like fractions:
640/1344 - 84/1344 = 640 - 84/1344 = 556/1344 - After reducing the fraction, the answer is 139/336
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