Add 15/81 and 4/90
15/81 + 4/90 is 31/135.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 90 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
15/81 = 15 × 10/81 × 10 = 150/810 - Likewise, for the 2nd fraction, since 90 × 9 = 810,
4/90 = 4 × 9/90 × 9 = 36/810 - Add the two like fractions:
150/810 + 36/810 = 150 + 36/810 = 186/810 - 186/810 simplified gives 31/135
- So, 15/81 + 4/90 = 31/135
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