Add 80/81 and 8/90
80/81 + 8/90 is 436/405.
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,
80/81 = 80 × 10/81 × 10 = 800/810 - Likewise, for the 2nd fraction, since 90 × 9 = 810,
8/90 = 8 × 9/90 × 9 = 72/810 - Add the two like fractions:
800/810 + 72/810 = 800 + 72/810 = 872/810 - 872/810 simplified gives 436/405
- So, 80/81 + 8/90 = 436/405
In mixed form: 131/405
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