Add 5/90 and 30/80
5/90 + 30/80 is 31/72.
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,
5/90 = 5 × 8/90 × 8 = 40/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
30/80 = 30 × 9/80 × 9 = 270/720 - Add the two like fractions:
40/720 + 270/720 = 40 + 270/720 = 310/720 - 310/720 simplified gives 31/72
- So, 5/90 + 30/80 = 31/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/90+30/80 5/90+60/80 15/90+30/80 5/90+90/80 25/90+30/80 35/90+30/80