Subtract 28/14 from 40/21
1st number: 1 19/21, 2nd number: 2 0/14
40/21 - 28/14 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
40/21 = 40 × 2/21 × 2 = 80/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
28/14 = 28 × 3/14 × 3 = 84/42 - Subtract the two like fractions:
80/42 - 84/42 = 80 - 84/42 = -4/42 - After reducing the fraction, the answer is -2/21
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