Subtract 21/14 from 3/40
1st number: 3/40, 2nd number: 1 7/14
3/40 - 21/14 is -57/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 14 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
3/40 = 3 × 7/40 × 7 = 21/280 - Likewise, for the 2nd fraction, since 14 × 20 = 280,
21/14 = 21 × 20/14 × 20 = 420/280 - Subtract the two like fractions:
21/280 - 420/280 = 21 - 420/280 = -399/280 - After reducing the fraction, the answer is -57/40
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