Add 18/2 and 30/20
1st number: 9 0/2, 2nd number: 1 10/20
18/2 + 30/20 is 21/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
18/2 = 18 × 10/2 × 10 = 180/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
30/20 = 30 × 1/20 × 1 = 30/20 - Add the two like fractions:
180/20 + 30/20 = 180 + 30/20 = 210/20 - 210/20 simplified gives 21/2
- So, 18/2 + 30/20 = 21/2
In mixed form: 101/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/2+30/20 18/2+60/20 18/4+30/20 18/2+30/40 54/2+30/20 18/2+90/20 18/6+30/20 18/2+30/60 90/2+30/20 18/10+30/20 18/14+30/20