Add 45/20 and 21/10
1st number: 2 5/20, 2nd number: 2 1/10
45/20 + 21/10 is 87/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
45/20 = 45 × 1/20 × 1 = 45/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
21/10 = 21 × 2/10 × 2 = 42/20 - Add the two like fractions:
45/20 + 42/20 = 45 + 42/20 = 87/20 - So, 45/20 + 21/10 = 87/20
In mixed form: 47/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+21/10 45/20+42/10 45/40+21/10 45/20+21/20 45/20+63/10 45/60+21/10 45/20+21/30 45/20+21/50 45/20+21/70