Subtract 81/4 from 15/27
1st number: 15/27, 2nd number: 20 1/4
15/27 - 81/4 is -709/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 4 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 27 × 4 = 108,
15/27 = 15 × 4/27 × 4 = 60/108 - Likewise, for the 2nd fraction, since 4 × 27 = 108,
81/4 = 81 × 27/4 × 27 = 2187/108 - Subtract the two like fractions:
60/108 - 2187/108 = 60 - 2187/108 = -2127/108 - After reducing the fraction, the answer is -709/36
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