Add 21/30 and 45/20
1st number: 21/30, 2nd number: 2 5/20
21/30 + 45/20 is 59/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
45/20 = 45 × 3/20 × 3 = 135/60 - Add the two like fractions:
42/60 + 135/60 = 42 + 135/60 = 177/60 - 177/60 simplified gives 59/20
- So, 21/30 + 45/20 = 59/20
In mixed form: 219/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+45/20 21/30+90/20 21/60+45/20 21/30+45/40 63/30+45/20 21/90+45/20 21/30+45/60