Add 25/20 and 21/4
1st number: 1 5/20, 2nd number: 5 1/4
25/20 + 21/4 is 13/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
25/20 = 25 × 1/20 × 1 = 25/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
21/4 = 21 × 5/4 × 5 = 105/20 - Add the two like fractions:
25/20 + 105/20 = 25 + 105/20 = 130/20 - 130/20 simplified gives 13/2
- So, 25/20 + 21/4 = 13/2
In mixed form: 61/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/20+21/4 25/20+42/4 25/40+21/4 25/20+21/8 75/20+21/4 25/20+63/4 25/60+21/4 25/20+21/12 25/20+21/20 25/20+21/28