Answers

Add 90/24 and 70/81

1^st number: 3 18/24, 2^nd number: 70/81

90/24 + 70/81 is 1495/324.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 24 and 81 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 24 × 27 = 648,
   90/24 = 90 × 27/24 × 27 = 2430/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   70/81 = 70 × 8/81 × 8 = 560/648
4. Add the two like fractions:
   2430/648 + 560/648 = 2430 + 560/648 = 2990/648
5. 2990/648 simplified gives 1495/324
6. So, 90/24 + 70/81 = 1495/324
   In mixed form: 4199/324

MathStep (Works offline)

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

Related: ⁹⁰/₄₈+⁷⁰/₈₁ ⁹⁰/₇₂+⁷⁰/₈₁

Add Fractions Calculator