Subtract 15/70 from 21/64
21/64 - 15/70 is 51/448.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 70 is 2240
Next, find the equivalent fraction of both fractional numbers with denominator 2240 - For the 1st fraction, since 64 × 35 = 2240,
21/64 = 21 × 35/64 × 35 = 735/2240 - Likewise, for the 2nd fraction, since 70 × 32 = 2240,
15/70 = 15 × 32/70 × 32 = 480/2240 - Subtract the two like fractions:
735/2240 - 480/2240 = 735 - 480/2240 = 255/2240 - After reducing the fraction, the answer is 51/448
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