Subtract 30/36 from 70/81
70/81 - 30/36 is 5/162.
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,
70/81 = 70 × 4/81 × 4 = 280/324 - Likewise, for the 2nd fraction, since 36 × 9 = 324,
30/36 = 30 × 9/36 × 9 = 270/324 - Subtract the two like fractions:
280/324 - 270/324 = 280 - 270/324 = 10/324 - After reducing the fraction, the answer is 5/162
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