Subtract 7/64 from 21/30
21/30 - 7/64 is 189/320.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 64 is 960
Next, find the equivalent fraction of both fractional numbers with denominator 960 - For the 1st fraction, since 30 × 32 = 960,
21/30 = 21 × 32/30 × 32 = 672/960 - Likewise, for the 2nd fraction, since 64 × 15 = 960,
7/64 = 7 × 15/64 × 15 = 105/960 - Subtract the two like fractions:
672/960 - 105/960 = 672 - 105/960 = 567/960 - After reducing the fraction, the answer is 189/320
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