Answers

Add 81/24 and 80/90

1^st number: 3 9/24, 2^nd number: 80/90

81/24 + 80/90 is 307/72.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 24 and 90 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 24 × 15 = 360,
   81/24 = 81 × 15/24 × 15 = 1215/360
3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
   80/90 = 80 × 4/90 × 4 = 320/360
4. Add the two like fractions:
   1215/360 + 320/360 = 1215 + 320/360 = 1535/360
5. 1535/360 simplified gives 307/72
6. So, 81/24 + 80/90 = 307/72
   In mixed form: 419/72

MathStep (Works offline)

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

Related: ⁸¹/₄₈+⁸⁰/₉₀ ⁸¹/₇₂+⁸⁰/₉₀

Add Fractions Calculator