Subtract 15/32 from 21/70
21/70 - 15/32 is -27/160.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 32 is 1120
Next, find the equivalent fraction of both fractional numbers with denominator 1120 - For the 1st fraction, since 70 × 16 = 1120,
21/70 = 21 × 16/70 × 16 = 336/1120 - Likewise, for the 2nd fraction, since 32 × 35 = 1120,
15/32 = 15 × 35/32 × 35 = 525/1120 - Subtract the two like fractions:
336/1120 - 525/1120 = 336 - 525/1120 = -189/1120 - After reducing the fraction, the answer is -27/160
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