Add 15/12 and 12/90
1st number: 1 3/12, 2nd number: 12/90
15/12 + 12/90 is 83/60.
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,
15/12 = 15 × 15/12 × 15 = 225/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
12/90 = 12 × 2/90 × 2 = 24/180 - Add the two like fractions:
225/180 + 24/180 = 225 + 24/180 = 249/180 - 249/180 simplified gives 83/60
- So, 15/12 + 12/90 = 83/60
In mixed form: 123/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12+12/90 15/12+24/90 15/24+12/90 45/12+12/90 15/12+36/90 15/36+12/90 75/12+12/90 15/12+60/90 15/60+12/90 15/12+84/90 15/84+12/90