Subtract 70/81 from 10/72
10/72 - 70/81 is -235/324.
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,
10/72 = 10 × 9/72 × 9 = 90/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
70/81 = 70 × 8/81 × 8 = 560/648 - Subtract the two like fractions:
90/648 - 560/648 = 90 - 560/648 = -470/648 - After reducing the fraction, the answer is -235/324
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