Subtract 81/70 from 18/5
1st number: 3 3/5, 2nd number: 1 11/70
18/5 - 81/70 is 171/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 5 × 14 = 70,
18/5 = 18 × 14/5 × 14 = 252/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
81/70 = 81 × 1/70 × 1 = 81/70 - Subtract the two like fractions:
252/70 - 81/70 = 252 - 81/70 = 171/70 - In mixed form: 231/70
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