Add 30/2 and 21/30
1st number: 15 0/2, 2nd number: 21/30
30/2 + 21/30 is 157/10.
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,
30/2 = 30 × 15/2 × 15 = 450/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30 - Add the two like fractions:
450/30 + 21/30 = 450 + 21/30 = 471/30 - 471/30 simplified gives 157/10
- So, 30/2 + 21/30 = 157/10
In mixed form: 157/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/2+21/30 30/2+42/30 30/4+21/30 30/2+21/60 90/2+21/30 30/2+63/30 30/6+21/30 30/2+21/90 30/10+21/30 30/14+21/30