Add 18/20 and 25/18
1st number: 18/20, 2nd number: 1 7/18
18/20 + 25/18 is 103/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
18/20 = 18 × 9/20 × 9 = 162/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
25/18 = 25 × 10/18 × 10 = 250/180 - Add the two like fractions:
162/180 + 250/180 = 162 + 250/180 = 412/180 - 412/180 simplified gives 103/45
- So, 18/20 + 25/18 = 103/45
In mixed form: 213/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+25/18 18/20+50/18 18/40+25/18 18/20+25/36 54/20+25/18 18/20+75/18 18/60+25/18 18/20+25/54 90/20+25/18 18/20+25/90