Add 18/80 and 10/90
18/80 + 10/90 is 121/360.
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,
18/80 = 18 × 9/80 × 9 = 162/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
10/90 = 10 × 8/90 × 8 = 80/720 - Add the two like fractions:
162/720 + 80/720 = 162 + 80/720 = 242/720 - 242/720 simplified gives 121/360
- So, 18/80 + 10/90 = 121/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/80+10/90 18/80+20/90 54/80+10/90 18/80+30/90 90/80+10/90 18/80+50/90 18/80+70/90