Subtract 30/81 from 8/16
8/16 - 30/81 is 7/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 81 is 1296
Next, find the equivalent fraction of both fractional numbers with denominator 1296 - For the 1st fraction, since 16 × 81 = 1296,
8/16 = 8 × 81/16 × 81 = 648/1296 - Likewise, for the 2nd fraction, since 81 × 16 = 1296,
30/81 = 30 × 16/81 × 16 = 480/1296 - Subtract the two like fractions:
648/1296 - 480/1296 = 648 - 480/1296 = 168/1296 - After reducing the fraction, the answer is 7/54
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