Subtract 20/81 from 9/16
9/16 - 20/81 is 409/1296.
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,
9/16 = 9 × 81/16 × 81 = 729/1296 - Likewise, for the 2nd fraction, since 81 × 16 = 1296,
20/81 = 20 × 16/81 × 16 = 320/1296 - Subtract the two like fractions:
729/1296 - 320/1296 = 729 - 320/1296 = 409/1296
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