Add 18/81 and 21/10
1st number: 18/81, 2nd number: 2 1/10
18/81 + 21/10 is 209/90.
Steps for adding 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,
18/81 = 18 × 10/81 × 10 = 180/810 - Likewise, for the 2nd fraction, since 10 × 81 = 810,
21/10 = 21 × 81/10 × 81 = 1701/810 - Add the two like fractions:
180/810 + 1701/810 = 180 + 1701/810 = 1881/810 - 1881/810 simplified gives 209/90
- So, 18/81 + 21/10 = 209/90
In mixed form: 229/90
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