Subtract 7/64 from 21/70
21/70 - 7/64 is 61/320.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 64 is 2240
Next, find the equivalent fraction of both fractional numbers with denominator 2240 - For the 1st fraction, since 70 × 32 = 2240,
21/70 = 21 × 32/70 × 32 = 672/2240 - Likewise, for the 2nd fraction, since 64 × 35 = 2240,
7/64 = 7 × 35/64 × 35 = 245/2240 - Subtract the two like fractions:
672/2240 - 245/2240 = 672 - 245/2240 = 427/2240 - After reducing the fraction, the answer is 61/320
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