Add 20/2 and 21/30
1st number: 10 0/2, 2nd number: 21/30
20/2 + 21/30 is 107/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 2 × 15 = 30,
20/2 = 20 × 15/2 × 15 = 300/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30 - Add the two like fractions:
300/30 + 21/30 = 300 + 21/30 = 321/30 - 321/30 simplified gives 107/10
- So, 20/2 + 21/30 = 107/10
In mixed form: 107/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/2+21/30 20/2+42/30 20/4+21/30 20/2+21/60 60/2+21/30 20/2+63/30 20/6+21/30 20/2+21/90 20/10+21/30 20/14+21/30