Add 15/12 and 45/15
1st number: 1 3/12, 2nd number: 3 0/15
15/12 + 45/15 is 17/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
15/12 = 15 × 5/12 × 5 = 75/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
45/15 = 45 × 4/15 × 4 = 180/60 - Add the two like fractions:
75/60 + 180/60 = 75 + 180/60 = 255/60 - 255/60 simplified gives 17/4
- So, 15/12 + 45/15 = 17/4
In mixed form: 41/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12+45/15 15/12+90/15 15/24+45/15 15/12+45/30 45/12+45/15 15/36+45/15 75/12+45/15 15/60+45/15 15/12+45/75 15/84+45/15