Add 20/90 and 30/12
1st number: 20/90, 2nd number: 2 6/12
20/90 + 30/12 is 49/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
20/90 = 20 × 2/90 × 2 = 40/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
30/12 = 30 × 15/12 × 15 = 450/180 - Add the two like fractions:
40/180 + 450/180 = 40 + 450/180 = 490/180 - 490/180 simplified gives 49/18
- So, 20/90 + 30/12 = 49/18
In mixed form: 213/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90+30/12 20/90+60/12 20/90+30/24 60/90+30/12 20/90+90/12 20/90+30/36 20/90+30/60 20/90+30/84