Add 21/81 and 20/8
1st number: 21/81, 2nd number: 2 4/8
21/81 + 20/8 is 149/54.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 8 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 81 × 8 = 648,
21/81 = 21 × 8/81 × 8 = 168/648 - Likewise, for the 2nd fraction, since 8 × 81 = 648,
20/8 = 20 × 81/8 × 81 = 1620/648 - Add the two like fractions:
168/648 + 1620/648 = 168 + 1620/648 = 1788/648 - 1788/648 simplified gives 149/54
- So, 21/81 + 20/8 = 149/54
In mixed form: 241/54
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