Add 21/81 and 2/8
21/81 + 2/8 is 55/108.
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,
2/8 = 2 × 81/8 × 81 = 162/648 - Add the two like fractions:
168/648 + 162/648 = 168 + 162/648 = 330/648 - 330/648 simplified gives 55/108
- So, 21/81 + 2/8 = 55/108
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