Add 18/24 and 72/90
18/24 + 72/90 is 31/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 24 × 15 = 360,
18/24 = 18 × 15/24 × 15 = 270/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
72/90 = 72 × 4/90 × 4 = 288/360 - Add the two like fractions:
270/360 + 288/360 = 270 + 288/360 = 558/360 - 558/360 simplified gives 31/20
- So, 18/24 + 72/90 = 31/20
In mixed form: 111/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/24+72/90 18/48+72/90 54/24+72/90 18/72+72/90 90/24+72/90