Subtract 42/90 from 7/64
7/64 - 42/90 is -343/960.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 90 is 2880
Next, find the equivalent fraction of both fractional numbers with denominator 2880 - For the 1st fraction, since 64 × 45 = 2880,
7/64 = 7 × 45/64 × 45 = 315/2880 - Likewise, for the 2nd fraction, since 90 × 32 = 2880,
42/90 = 42 × 32/90 × 32 = 1344/2880 - Subtract the two like fractions:
315/2880 - 1344/2880 = 315 - 1344/2880 = -1029/2880 - After reducing the fraction, the answer is -343/960
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