Add 40/50 and 15/20
40/50 + 15/20 is 31/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 20 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 50 × 2 = 100,
40/50 = 40 × 2/50 × 2 = 80/100 - Likewise, for the 2nd fraction, since 20 × 5 = 100,
15/20 = 15 × 5/20 × 5 = 75/100 - Add the two like fractions:
80/100 + 75/100 = 80 + 75/100 = 155/100 - 155/100 simplified gives 31/20
- So, 40/50 + 15/20 = 31/20
In mixed form: 111/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/50+15/20 40/50+30/20 40/50+15/40 40/50+45/20 40/50+15/60 40/50+75/20