Subtract 81/15 from 28/30
1st number: 28/30, 2nd number: 5 6/15
28/30 - 81/15 is -67/15.
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,
28/30 = 28 × 1/30 × 1 = 28/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
81/15 = 81 × 2/15 × 2 = 162/30 - Subtract the two like fractions:
28/30 - 162/30 = 28 - 162/30 = -134/30 - After reducing the fraction, the answer is -67/15
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