Subtract 18/20 from 72/35
1st number: 2 2/35, 2nd number: 18/20
72/35 - 18/20 is 81/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 35 × 4 = 140,
72/35 = 72 × 4/35 × 4 = 288/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
18/20 = 18 × 7/20 × 7 = 126/140 - Subtract the two like fractions:
288/140 - 126/140 = 288 - 126/140 = 162/140 - After reducing the fraction, the answer is 81/70
- In mixed form: 111/70
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