Add 20/18 and 30/40
1st number: 1 2/18, 2nd number: 30/40
20/18 + 30/40 is 67/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
20/18 = 20 × 20/18 × 20 = 400/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
30/40 = 30 × 9/40 × 9 = 270/360 - Add the two like fractions:
400/360 + 270/360 = 400 + 270/360 = 670/360 - 670/360 simplified gives 67/36
- So, 20/18 + 30/40 = 67/36
In mixed form: 131/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+30/40 20/18+60/40 20/36+30/40 20/18+30/80 60/18+30/40 20/18+90/40 20/54+30/40 20/90+30/40