Add 5/80 and 9/90
5/80 + 9/90 is 13/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
5/80 = 5 × 9/80 × 9 = 45/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
9/90 = 9 × 8/90 × 8 = 72/720 - Add the two like fractions:
45/720 + 72/720 = 45 + 72/720 = 117/720 - 117/720 simplified gives 13/80
- So, 5/80 + 9/90 = 13/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/80+9/90 5/80+18/90 15/80+9/90 5/80+27/90 25/80+9/90 5/80+45/90 35/80+9/90 5/80+63/90