Subtract 40/21 from 8/28
1st number: 8/28, 2nd number: 1 19/21
8/28 - 40/21 is -34/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
8/28 = 8 × 3/28 × 3 = 24/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
40/21 = 40 × 4/21 × 4 = 160/84 - Subtract the two like fractions:
24/84 - 160/84 = 24 - 160/84 = -136/84 - After reducing the fraction, the answer is -34/21
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