Subtract 7/81 from 18/10
1st number: 1 8/10, 2nd number: 7/81
18/10 - 7/81 is 694/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 10 × 81 = 810,
18/10 = 18 × 81/10 × 81 = 1458/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
7/81 = 7 × 10/81 × 10 = 70/810 - Subtract the two like fractions:
1458/810 - 70/810 = 1458 - 70/810 = 1388/810 - After reducing the fraction, the answer is 694/405
- In mixed form: 1289/405
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