Subtract 42/30 from 21/64
1st number: 21/64, 2nd number: 1 12/30
21/64 - 42/30 is -343/320.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 30 is 960
Next, find the equivalent fraction of both fractional numbers with denominator 960 - For the 1st fraction, since 64 × 15 = 960,
21/64 = 21 × 15/64 × 15 = 315/960 - Likewise, for the 2nd fraction, since 30 × 32 = 960,
42/30 = 42 × 32/30 × 32 = 1344/960 - Subtract the two like fractions:
315/960 - 1344/960 = 315 - 1344/960 = -1029/960 - After reducing the fraction, the answer is -343/320
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