Add 30/40 and 15/50
30/40 + 15/50 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 50 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 40 × 5 = 200,
30/40 = 30 × 5/40 × 5 = 150/200 - Likewise, for the 2nd fraction, since 50 × 4 = 200,
15/50 = 15 × 4/50 × 4 = 60/200 - Add the two like fractions:
150/200 + 60/200 = 150 + 60/200 = 210/200 - 210/200 simplified gives 21/20
- So, 30/40 + 15/50 = 21/20
In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40+15/50 30/40+30/50 30/80+15/50 90/40+15/50 30/40+45/50 30/40+75/50