Subtract 15/16 from 21/35
21/35 - 15/16 is -27/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 16 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 35 × 16 = 560,
21/35 = 21 × 16/35 × 16 = 336/560 - Likewise, for the 2nd fraction, since 16 × 35 = 560,
15/16 = 15 × 35/16 × 35 = 525/560 - Subtract the two like fractions:
336/560 - 525/560 = 336 - 525/560 = -189/560 - After reducing the fraction, the answer is -27/80
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