Subtract 18/28 from 81/40
1st number: 2 1/40, 2nd number: 18/28
81/40 - 18/28 is 387/280.
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,
81/40 = 81 × 7/40 × 7 = 567/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
18/28 = 18 × 10/28 × 10 = 180/280 - Subtract the two like fractions:
567/280 - 180/280 = 567 - 180/280 = 387/280 - In mixed form: 1107/280
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