Subtract 21/30 from 30/56
30/56 - 21/30 is -23/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 30 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 56 × 15 = 840,
30/56 = 30 × 15/56 × 15 = 450/840 - Likewise, for the 2nd fraction, since 30 × 28 = 840,
21/30 = 21 × 28/30 × 28 = 588/840 - Subtract the two like fractions:
450/840 - 588/840 = 450 - 588/840 = -138/840 - After reducing the fraction, the answer is -23/140
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