Subtract 3/81 from 21/10
1st number: 2 1/10, 2nd number: 3/81
21/10 - 3/81 is 557/270.
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,
21/10 = 21 × 81/10 × 81 = 1701/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
3/81 = 3 × 10/81 × 10 = 30/810 - Subtract the two like fractions:
1701/810 - 30/810 = 1701 - 30/810 = 1671/810 - After reducing the fraction, the answer is 557/270
- In mixed form: 217/270
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