Subtract 8/15 from 81/30
1st number: 2 21/30, 2nd number: 8/15
81/30 - 8/15 is 13/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
81/30 = 81 × 1/30 × 1 = 81/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
8/15 = 8 × 2/15 × 2 = 16/30 - Subtract the two like fractions:
81/30 - 16/30 = 81 - 16/30 = 65/30 - After reducing the fraction, the answer is 13/6
- In mixed form: 21/6
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