Subtract 25/42 from 30/64
30/64 - 25/42 is -85/672.
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,
30/64 = 30 × 21/64 × 21 = 630/1344 - Likewise, for the 2nd fraction, since 42 × 32 = 1344,
25/42 = 25 × 32/42 × 32 = 800/1344 - Subtract the two like fractions:
630/1344 - 800/1344 = 630 - 800/1344 = -170/1344 - After reducing the fraction, the answer is -85/672
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