Subtract 81/27 from 15/30
1st number: 15/30, 2nd number: 3 0/27
15/30 - 81/27 is -5/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
15/30 = 15 × 9/30 × 9 = 135/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
81/27 = 81 × 10/27 × 10 = 810/270 - Subtract the two like fractions:
135/270 - 810/270 = 135 - 810/270 = -675/270 - After reducing the fraction, the answer is -5/2
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