Add 5/90 and 5/80
5/90 + 5/80 is 17/144.
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,
5/80 = 5 × 9/80 × 9 = 45/720 - Add the two like fractions:
40/720 + 45/720 = 40 + 45/720 = 85/720 - 85/720 simplified gives 17/144
- So, 5/90 + 5/80 = 17/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/90+5/80 5/90+10/80 15/90+5/80 5/90+15/80 25/90+5/80 5/90+25/80 35/90+5/80 5/90+35/80