Subtract 49/64 from 21/45
21/45 - 49/64 is -287/960.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 64 is 2880
Next, find the equivalent fraction of both fractional numbers with denominator 2880 - For the 1st fraction, since 45 × 64 = 2880,
21/45 = 21 × 64/45 × 64 = 1344/2880 - Likewise, for the 2nd fraction, since 64 × 45 = 2880,
49/64 = 49 × 45/64 × 45 = 2205/2880 - Subtract the two like fractions:
1344/2880 - 2205/2880 = 1344 - 2205/2880 = -861/2880 - After reducing the fraction, the answer is -287/960
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