Subtract 7/81 from 30/36
30/36 - 7/81 is 121/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 36 × 9 = 324,
30/36 = 30 × 9/36 × 9 = 270/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
7/81 = 7 × 4/81 × 4 = 28/324 - Subtract the two like fractions:
270/324 - 28/324 = 270 - 28/324 = 242/324 - After reducing the fraction, the answer is 121/162
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