Add 30/40 and 80/20
1st number: 30/40, 2nd number: 4 0/20
30/40 + 80/20 is 19/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
30/40 = 30 × 1/40 × 1 = 30/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
80/20 = 80 × 2/20 × 2 = 160/40 - Add the two like fractions:
30/40 + 160/40 = 30 + 160/40 = 190/40 - 190/40 simplified gives 19/4
- So, 30/40 + 80/20 = 19/4
In mixed form: 43/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40+80/20 30/80+80/20 30/40+80/40 90/40+80/20 30/40+80/60