Add 20/40 and 45/18
1st number: 20/40, 2nd number: 2 9/18
20/40 + 45/18 is 3/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
20/40 = 20 × 9/40 × 9 = 180/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
45/18 = 45 × 20/18 × 20 = 900/360 - Add the two like fractions:
180/360 + 900/360 = 180 + 900/360 = 1080/360 - 1080/360 simplified gives 3/1
- So, 20/40 + 45/18 = 3/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40+90/18 20/80+45/18 20/40+45/36 60/40+45/18 20/40+45/54 20/40+45/90