Add 18/20 and 21/50
18/20 + 21/50 is 33/25.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 50 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
18/20 = 18 × 5/20 × 5 = 90/100 - Likewise, for the 2nd fraction, since 50 × 2 = 100,
21/50 = 21 × 2/50 × 2 = 42/100 - Add the two like fractions:
90/100 + 42/100 = 90 + 42/100 = 132/100 - 132/100 simplified gives 33/25
- So, 18/20 + 21/50 = 33/25
In mixed form: 18/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+21/50 18/20+42/50 18/40+21/50 54/20+21/50 18/20+63/50 18/60+21/50 90/20+21/50