Subtract 18/35 from 81/20
1st number: 4 1/20, 2nd number: 18/35
81/20 - 18/35 is 99/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
81/20 = 81 × 7/20 × 7 = 567/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
18/35 = 18 × 4/35 × 4 = 72/140 - Subtract the two like fractions:
567/140 - 72/140 = 567 - 72/140 = 495/140 - After reducing the fraction, the answer is 99/28
- In mixed form: 315/28
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