Add 28/40 and 36/18
1st number: 28/40, 2nd number: 2 0/18
28/40 + 36/18 is 27/10.
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,
28/40 = 28 × 9/40 × 9 = 252/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
36/18 = 36 × 20/18 × 20 = 720/360 - Add the two like fractions:
252/360 + 720/360 = 252 + 720/360 = 972/360 - 972/360 simplified gives 27/10
- So, 28/40 + 36/18 = 27/10
In mixed form: 27/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40+36/18 28/40+72/18 28/80+36/18 84/40+36/18 28/40+36/54 28/40+36/90