Subtract 21/56 from 18/7
1st number: 2 4/7, 2nd number: 21/56
18/7 - 21/56 is 123/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 56 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
18/7 = 18 × 8/7 × 8 = 144/56 - Likewise, for the 2nd fraction, since 56 × 1 = 56,
21/56 = 21 × 1/56 × 1 = 21/56 - Subtract the two like fractions:
144/56 - 21/56 = 144 - 21/56 = 123/56 - In mixed form: 211/56
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