Add 20/40 and 45/50
20/40 + 45/50 is 7/5.
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,
20/40 = 20 × 5/40 × 5 = 100/200 - Likewise, for the 2nd fraction, since 50 × 4 = 200,
45/50 = 45 × 4/50 × 4 = 180/200 - Add the two like fractions:
100/200 + 180/200 = 100 + 180/200 = 280/200 - 280/200 simplified gives 7/5
- So, 20/40 + 45/50 = 7/5
In mixed form: 12/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40+90/50 20/80+45/50 60/40+45/50