Add 30/12 and 12/90
1st number: 2 6/12, 2nd number: 12/90
30/12 + 12/90 is 79/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
30/12 = 30 × 15/12 × 15 = 450/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
12/90 = 12 × 2/90 × 2 = 24/180 - Add the two like fractions:
450/180 + 24/180 = 450 + 24/180 = 474/180 - 474/180 simplified gives 79/30
- So, 30/12 + 12/90 = 79/30
In mixed form: 219/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12+12/90 30/12+24/90 30/24+12/90 90/12+12/90 30/12+36/90 30/36+12/90 30/12+60/90 30/60+12/90 30/12+84/90 30/84+12/90