Add 3/8 and 21/81
3/8 + 21/81 is 137/216.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 8 × 81 = 648,
3/8 = 3 × 81/8 × 81 = 243/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
21/81 = 21 × 8/81 × 8 = 168/648 - Add the two like fractions:
243/648 + 168/648 = 243 + 168/648 = 411/648 - 411/648 simplified gives 137/216
- So, 3/8 + 21/81 = 137/216
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