Answers

Add 90/18 and 84/80

1^st number: 5 0/18, 2^nd number: 1 4/80

90/18 + 84/80 is 121/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 18 × 40 = 720,
   90/18 = 90 × 40/18 × 40 = 3600/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   84/80 = 84 × 9/80 × 9 = 756/720
4. Add the two like fractions:
   3600/720 + 756/720 = 3600 + 756/720 = 4356/720
5. 4356/720 simplified gives 121/20
6. So, 90/18 + 84/80 = 121/20
   In mixed form: 61/20

MathStep (Works offline)

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

Related: ⁹⁰/₃₆+⁸⁴/₈₀ ⁹⁰/₅₄+⁸⁴/₈₀

Add Fractions Calculator