Add 72/81 and 45/90
72/81 + 45/90 is 25/18.
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,
72/81 = 72 × 10/81 × 10 = 720/810 - Likewise, for the 2nd fraction, since 90 × 9 = 810,
45/90 = 45 × 9/90 × 9 = 405/810 - Add the two like fractions:
720/810 + 405/810 = 720 + 405/810 = 1125/810 - 1125/810 simplified gives 25/18
- So, 72/81 + 45/90 = 25/18
In mixed form: 17/18
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