Add 18/80 and 7/72
18/80 + 7/72 is 29/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 72 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 72 × 10 = 720,
7/72 = 7 × 10/72 × 10 = 70/720 - Add the two like fractions:
162/720 + 70/720 = 162 + 70/720 = 232/720 - 232/720 simplified gives 29/90
- So, 18/80 + 7/72 = 29/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/80+7/72 18/80+14/72 54/80+7/72 18/80+21/72 90/80+7/72 18/80+35/72 18/80+49/72