Subtract 18/40 from 21/14
1st number: 1 7/14, 2nd number: 18/40
21/14 - 18/40 is 21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 14 × 20 = 280,
21/14 = 21 × 20/14 × 20 = 420/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
18/40 = 18 × 7/40 × 7 = 126/280 - Subtract the two like fractions:
420/280 - 126/280 = 420 - 126/280 = 294/280 - After reducing the fraction, the answer is 21/20
- In mixed form: 11/20
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