Subtract 3/15 from 81/30
1st number: 2 21/30, 2nd number: 3/15
81/30 - 3/15 is 5/2.
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,
3/15 = 3 × 2/15 × 2 = 6/30 - Subtract the two like fractions:
81/30 - 6/30 = 81 - 6/30 = 75/30 - After reducing the fraction, the answer is 5/2
- In mixed form: 21/2
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