Subtract 20/7 from 81/15
1st number: 5 6/15, 2nd number: 2 6/7
81/15 - 20/7 is 89/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
81/15 = 81 × 7/15 × 7 = 567/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
20/7 = 20 × 15/7 × 15 = 300/105 - Subtract the two like fractions:
567/105 - 300/105 = 567 - 300/105 = 267/105 - After reducing the fraction, the answer is 89/35
- In mixed form: 219/35
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