Answers

Add 70/90 and 3/81

70/90 + 3/81 is 22/27.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 81 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 90 × 9 = 810,
   70/90 = 70 × 9/90 × 9 = 630/810
3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
   3/81 = 3 × 10/81 × 10 = 30/810
4. Add the two like fractions:
   630/810 + 30/810 = 630 + 30/810 = 660/810
5. 660/810 simplified gives 22/27
6. So, 70/90 + 3/81 = 22/27

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁷⁰/₉₀+⁶/₈₁ ⁷⁰/₉₀+⁹/₈₁ ⁷⁰/₉₀+¹⁵/₈₁ ⁷⁰/₉₀+²¹/₈₁

Add Fractions Calculator