Add 28/90 and 24/80
28/90 + 24/80 is 11/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
28/90 = 28 × 8/90 × 8 = 224/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
24/80 = 24 × 9/80 × 9 = 216/720 - Add the two like fractions:
224/720 + 216/720 = 224 + 216/720 = 440/720 - 440/720 simplified gives 11/18
- So, 28/90 + 24/80 = 11/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90+24/80 28/90+48/80 84/90+24/80 28/90+72/80