Add 7/15 and 18/81
7/15 + 18/81 is 31/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 15 × 27 = 405,
7/15 = 7 × 27/15 × 27 = 189/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
18/81 = 18 × 5/81 × 5 = 90/405 - Add the two like fractions:
189/405 + 90/405 = 189 + 90/405 = 279/405 - 279/405 simplified gives 31/45
- So, 7/15 + 18/81 = 31/45
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