Add 30/80 and 18/5
1st number: 30/80, 2nd number: 3 3/5
30/80 + 18/5 is 159/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 5 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
30/80 = 30 × 1/80 × 1 = 30/80 - Likewise, for the 2nd fraction, since 5 × 16 = 80,
18/5 = 18 × 16/5 × 16 = 288/80 - Add the two like fractions:
30/80 + 288/80 = 30 + 288/80 = 318/80 - 318/80 simplified gives 159/40
- So, 30/80 + 18/5 = 159/40
In mixed form: 339/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80+18/5 30/80+36/5 30/80+18/10 90/80+18/5 30/80+54/5 30/80+18/15 30/80+90/5 30/80+18/25 30/80+18/35