Add 25/20 and 21/30
1st number: 1 5/20, 2nd number: 21/30
25/20 + 21/30 is 39/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
25/20 = 25 × 3/20 × 3 = 75/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Add the two like fractions:
75/60 + 42/60 = 75 + 42/60 = 117/60 - 117/60 simplified gives 39/20
- So, 25/20 + 21/30 = 39/20
In mixed form: 119/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/20+21/30 25/20+42/30 25/40+21/30 25/20+21/60 75/20+21/30 25/20+63/30 25/60+21/30 25/20+21/90