Answers

Add 90/36 and 60/80

1^st number: 2 18/36, 2^nd number: 60/80

90/36 + 60/80 is 13/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 36 × 20 = 720,
   90/36 = 90 × 20/36 × 20 = 1800/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   60/80 = 60 × 9/80 × 9 = 540/720
4. Add the two like fractions:
   1800/720 + 540/720 = 1800 + 540/720 = 2340/720
5. 2340/720 simplified gives 13/4
6. So, 90/36 + 60/80 = 13/4
   In mixed form: 31/4

MathStep (Works offline)

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

Related: ⁹⁰/₇₂+⁶⁰/₈₀

Add Fractions Calculator