Subtract 21/28 from 1/40
1/40 - 21/28 is -29/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 28 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
1/40 = 1 × 7/40 × 7 = 7/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
21/28 = 21 × 10/28 × 10 = 210/280 - Subtract the two like fractions:
7/280 - 210/280 = 7 - 210/280 = -203/280 - After reducing the fraction, the answer is -29/40
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