Add 18/5 and 30/20
1st number: 3 3/5, 2nd number: 1 10/20
18/5 + 30/20 is 51/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 5 × 4 = 20,
18/5 = 18 × 4/5 × 4 = 72/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
30/20 = 30 × 1/20 × 1 = 30/20 - Add the two like fractions:
72/20 + 30/20 = 72 + 30/20 = 102/20 - 102/20 simplified gives 51/10
- So, 18/5 + 30/20 = 51/10
In mixed form: 51/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/5+30/20 18/5+60/20 18/10+30/20 18/5+30/40 54/5+30/20 18/5+90/20 18/15+30/20 18/5+30/60 90/5+30/20 18/25+30/20 18/35+30/20