Subtract 49/16 from 20/81
1st number: 20/81, 2nd number: 3 1/16
20/81 - 49/16 is -3649/1296.
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,
20/81 = 20 × 16/81 × 16 = 320/1296 - Likewise, for the 2nd fraction, since 16 × 81 = 1296,
49/16 = 49 × 81/16 × 81 = 3969/1296 - Subtract the two like fractions:
320/1296 - 3969/1296 = 320 - 3969/1296 = -3649/1296
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