Add 45/4 and 21/10
1st number: 11 1/4, 2nd number: 2 1/10
45/4 + 21/10 is 267/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
45/4 = 45 × 5/4 × 5 = 225/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
21/10 = 21 × 2/10 × 2 = 42/20 - Add the two like fractions:
225/20 + 42/20 = 225 + 42/20 = 267/20 - So, 45/4 + 21/10 = 267/20
In mixed form: 137/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/4+21/10 45/4+42/10 45/8+21/10 45/4+21/20 45/4+63/10 45/12+21/10 45/4+21/30 45/20+21/10 45/4+21/50 45/28+21/10 45/4+21/70