Add 20/18 and 35/40
1st number: 1 2/18, 2nd number: 35/40
20/18 + 35/40 is 143/72.
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,
35/40 = 35 × 9/40 × 9 = 315/360 - Add the two like fractions:
400/360 + 315/360 = 400 + 315/360 = 715/360 - 715/360 simplified gives 143/72
- So, 20/18 + 35/40 = 143/72
In mixed form: 171/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+35/40 20/18+70/40 20/36+35/40 20/18+35/80 60/18+35/40 20/54+35/40 20/90+35/40