Add 7/81 and 2/90
7/81 + 2/90 is 44/405.
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,
7/81 = 7 × 10/81 × 10 = 70/810 - Likewise, for the 2nd fraction, since 90 × 9 = 810,
2/90 = 2 × 9/90 × 9 = 18/810 - Add the two like fractions:
70/810 + 18/810 = 70 + 18/810 = 88/810 - 88/810 simplified gives 44/405
- So, 7/81 + 2/90 = 44/405
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