Subtract 7/64 from 21/90
21/90 - 7/64 is 119/960.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 64 is 2880
Next, find the equivalent fraction of both fractional numbers with denominator 2880 - For the 1st fraction, since 90 × 32 = 2880,
21/90 = 21 × 32/90 × 32 = 672/2880 - Likewise, for the 2nd fraction, since 64 × 45 = 2880,
7/64 = 7 × 45/64 × 45 = 315/2880 - Subtract the two like fractions:
672/2880 - 315/2880 = 672 - 315/2880 = 357/2880 - After reducing the fraction, the answer is 119/960
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