Subtract 15/16 from 8/81
8/81 - 15/16 is -1087/1296.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 16 is 1296
Next, find the equivalent fraction of both fractional numbers with denominator 1296 - For the 1st fraction, since 81 × 16 = 1296,
8/81 = 8 × 16/81 × 16 = 128/1296 - Likewise, for the 2nd fraction, since 16 × 81 = 1296,
15/16 = 15 × 81/16 × 81 = 1215/1296 - Subtract the two like fractions:
128/1296 - 1215/1296 = 128 - 1215/1296 = -1087/1296
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