Subtract 15/56 from 21/80
21/80 - 15/56 is -3/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 56 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
21/80 = 21 × 7/80 × 7 = 147/560 - Likewise, for the 2nd fraction, since 56 × 10 = 560,
15/56 = 15 × 10/56 × 10 = 150/560 - Subtract the two like fractions:
147/560 - 150/560 = 147 - 150/560 = -3/560
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