Subtract 1/81 from 30/72
30/72 - 1/81 is 131/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 72 × 9 = 648,
30/72 = 30 × 9/72 × 9 = 270/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
1/81 = 1 × 8/81 × 8 = 8/648 - Subtract the two like fractions:
270/648 - 8/648 = 270 - 8/648 = 262/648 - After reducing the fraction, the answer is 131/324
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