Subtract 3/56 from 21/30
21/30 - 3/56 is 181/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 30 × 28 = 840,
21/30 = 21 × 28/30 × 28 = 588/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
3/56 = 3 × 15/56 × 15 = 45/840 - Subtract the two like fractions:
588/840 - 45/840 = 588 - 45/840 = 543/840 - After reducing the fraction, the answer is 181/280
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