Subtract 15/10 from 7/81
1st number: 7/81, 2nd number: 1 5/10
7/81 - 15/10 is -229/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 10 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
7/81 = 7 × 10/81 × 10 = 70/810 - Likewise, for the 2nd fraction, since 10 × 81 = 810,
15/10 = 15 × 81/10 × 81 = 1215/810 - Subtract the two like fractions:
70/810 - 1215/810 = 70 - 1215/810 = -1145/810 - After reducing the fraction, the answer is -229/162
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