Subtract 40/81 from 4/16
4/16 - 40/81 is -79/324.
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,
4/16 = 4 × 81/16 × 81 = 324/1296 - Likewise, for the 2nd fraction, since 81 × 16 = 1296,
40/81 = 40 × 16/81 × 16 = 640/1296 - Subtract the two like fractions:
324/1296 - 640/1296 = 324 - 640/1296 = -316/1296 - After reducing the fraction, the answer is -79/324
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