Subtract 40/8 from 56/21
1st number: 2 14/21, 2nd number: 5 0/8
56/21 - 40/8 is -7/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
56/21 = 56 × 8/21 × 8 = 448/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
40/8 = 40 × 21/8 × 21 = 840/168 - Subtract the two like fractions:
448/168 - 840/168 = 448 - 840/168 = -392/168 - After reducing the fraction, the answer is -7/3
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