Subtract 42/48 from 1/81
1/81 - 42/48 is -559/648.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 48 is 1296
Next, find the equivalent fraction of both fractional numbers with denominator 1296 - For the 1st fraction, since 81 × 16 = 1296,
1/81 = 1 × 16/81 × 16 = 16/1296 - Likewise, for the 2nd fraction, since 48 × 27 = 1296,
42/48 = 42 × 27/48 × 27 = 1134/1296 - Subtract the two like fractions:
16/1296 - 1134/1296 = 16 - 1134/1296 = -1118/1296 - After reducing the fraction, the answer is -559/648
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