Subtract 12/56 from 40/21
1st number: 1 19/21, 2nd number: 12/56
40/21 - 12/56 is 71/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
40/21 = 40 × 8/21 × 8 = 320/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
12/56 = 12 × 3/56 × 3 = 36/168 - Subtract the two like fractions:
320/168 - 36/168 = 320 - 36/168 = 284/168 - After reducing the fraction, the answer is 71/42
- In mixed form: 129/42
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