Subtract 21/64 from 15/63
15/63 - 21/64 is -121/1344.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 64 is 4032
Next, find the equivalent fraction of both fractional numbers with denominator 4032 - For the 1st fraction, since 63 × 64 = 4032,
15/63 = 15 × 64/63 × 64 = 960/4032 - Likewise, for the 2nd fraction, since 64 × 63 = 4032,
21/64 = 21 × 63/64 × 63 = 1323/4032 - Subtract the two like fractions:
960/4032 - 1323/4032 = 960 - 1323/4032 = -363/4032 - After reducing the fraction, the answer is -121/1344
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