Add 15/5 and 30/20
1st number: 3 0/5, 2nd number: 1 10/20
15/5 + 30/20 is 9/2.
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,
15/5 = 15 × 4/5 × 4 = 60/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
30/20 = 30 × 1/20 × 1 = 30/20 - Add the two like fractions:
60/20 + 30/20 = 60 + 30/20 = 90/20 - 90/20 simplified gives 9/2
- So, 15/5 + 30/20 = 9/2
In mixed form: 41/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5+30/20 15/5+60/20 15/10+30/20 15/5+30/40 45/5+30/20 15/5+90/20 15/5+30/60 75/5+30/20 15/25+30/20 15/35+30/20