Answers

Add 6/84 and 90/81

1^st number: 6/84, 2^nd number: 1 9/81

6/84 + 90/81 is 149/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 81 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 84 × 27 = 2268,
   6/84 = 6 × 27/84 × 27 = 162/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   90/81 = 90 × 28/81 × 28 = 2520/2268
4. Add the two like fractions:
   162/2268 + 2520/2268 = 162 + 2520/2268 = 2682/2268
5. 2682/2268 simplified gives 149/126
6. So, 6/84 + 90/81 = 149/126
   In mixed form: 123/126

MathStep (Works offline)

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

Related: ¹²/₈₄+⁹⁰/₈₁ ¹⁸/₈₄+⁹⁰/₈₁ ³⁰/₈₄+⁹⁰/₈₁ ⁴²/₈₄+⁹⁰/₈₁

Add Fractions Calculator