Add 18/40 and 15/72
18/40 + 15/72 is 79/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
18/40 = 18 × 9/40 × 9 = 162/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
15/72 = 15 × 5/72 × 5 = 75/360 - Add the two like fractions:
162/360 + 75/360 = 162 + 75/360 = 237/360 - 237/360 simplified gives 79/120
- So, 18/40 + 15/72 = 79/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40+15/72 18/40+30/72 18/80+15/72 54/40+15/72 18/40+45/72 90/40+15/72 18/40+75/72