Add 7/81 and 21/10
1st number: 7/81, 2nd number: 2 1/10
7/81 + 21/10 is 1771/810.
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,
7/81 = 7 × 10/81 × 10 = 70/810 - Likewise, for the 2nd fraction, since 10 × 81 = 810,
21/10 = 21 × 81/10 × 81 = 1701/810 - Add the two like fractions:
70/810 + 1701/810 = 70 + 1701/810 = 1771/810 - So, 7/81 + 21/10 = 1771/810
In mixed form: 2151/810
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