Subtract 4/36 from 25/81
25/81 - 4/36 is 16/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 36 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
25/81 = 25 × 4/81 × 4 = 100/324 - Likewise, for the 2nd fraction, since 36 × 9 = 324,
4/36 = 4 × 9/36 × 9 = 36/324 - Subtract the two like fractions:
100/324 - 36/324 = 100 - 36/324 = 64/324 - After reducing the fraction, the answer is 16/81
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