Add 30/20 and 42/18
1st number: 1 10/20, 2nd number: 2 6/18
30/20 + 42/18 is 23/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
30/20 = 30 × 9/20 × 9 = 270/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
42/18 = 42 × 10/18 × 10 = 420/180 - Add the two like fractions:
270/180 + 420/180 = 270 + 420/180 = 690/180 - 690/180 simplified gives 23/6
- So, 30/20 + 42/18 = 23/6
In mixed form: 35/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20+42/18 30/20+84/18 30/40+42/18 30/20+42/36 90/20+42/18 30/60+42/18 30/20+42/54 30/20+42/90