Add 20/81 and 16/90
20/81 + 16/90 is 172/405.
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,
20/81 = 20 × 10/81 × 10 = 200/810 - Likewise, for the 2nd fraction, since 90 × 9 = 810,
16/90 = 16 × 9/90 × 9 = 144/810 - Add the two like fractions:
200/810 + 144/810 = 200 + 144/810 = 344/810 - 344/810 simplified gives 172/405
- So, 20/81 + 16/90 = 172/405
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