Subtract 18/70 from 81/40
1st number: 2 1/40, 2nd number: 18/70
81/40 - 18/70 is 99/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 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 70 × 4 = 280,
18/70 = 18 × 4/70 × 4 = 72/280 - Subtract the two like fractions:
567/280 - 72/280 = 567 - 72/280 = 495/280 - After reducing the fraction, the answer is 99/56
- In mixed form: 143/56
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