Add 5/8 and 80/90
5/8 + 80/90 is 109/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
5/8 = 5 × 45/8 × 45 = 225/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
80/90 = 80 × 4/90 × 4 = 320/360 - Add the two like fractions:
225/360 + 320/360 = 225 + 320/360 = 545/360 - 545/360 simplified gives 109/72
- So, 5/8 + 80/90 = 109/72
In mixed form: 137/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/8+80/90 5/16+80/90 15/8+80/90 5/24+80/90 25/8+80/90 5/40+80/90 35/8+80/90 5/56+80/90