Subtract 12/5 from 21/64
1st number: 21/64, 2nd number: 2 2/5
21/64 - 12/5 is -663/320.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 5 is 320
Next, find the equivalent fraction of both fractional numbers with denominator 320 - For the 1st fraction, since 64 × 5 = 320,
21/64 = 21 × 5/64 × 5 = 105/320 - Likewise, for the 2nd fraction, since 5 × 64 = 320,
12/5 = 12 × 64/5 × 64 = 768/320 - Subtract the two like fractions:
105/320 - 768/320 = 105 - 768/320 = -663/320
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