Add 15/20 and 3/12
15/20 + 3/12 is 1/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
15/20 = 15 × 3/20 × 3 = 45/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
3/12 = 3 × 5/12 × 5 = 15/60 - Add the two like fractions:
45/60 + 15/60 = 45 + 15/60 = 60/60 - 60/60 simplified gives 1/1
- So, 15/20 + 3/12 = 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20+3/12 15/20+6/12 15/40+3/12 15/20+3/24 45/20+3/12 15/20+9/12 15/60+3/12 15/20+3/36 75/20+3/12 15/20+15/12 15/20+3/60 15/20+21/12 15/20+3/84