Add 30/50 and 18/40
30/50 + 18/40 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 40 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 50 × 4 = 200,
30/50 = 30 × 4/50 × 4 = 120/200 - Likewise, for the 2nd fraction, since 40 × 5 = 200,
18/40 = 18 × 5/40 × 5 = 90/200 - Add the two like fractions:
120/200 + 90/200 = 120 + 90/200 = 210/200 - 210/200 simplified gives 21/20
- So, 30/50 + 18/40 = 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: 60/50+18/40 30/50+36/40 30/50+18/80 90/50+18/40 30/50+54/40 30/50+90/40