Add 15/40 and 20/12
1st number: 15/40, 2nd number: 1 8/12
15/40 + 20/12 is 49/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 12 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
15/40 = 15 × 3/40 × 3 = 45/120 - Likewise, for the 2nd fraction, since 12 × 10 = 120,
20/12 = 20 × 10/12 × 10 = 200/120 - Add the two like fractions:
45/120 + 200/120 = 45 + 200/120 = 245/120 - 245/120 simplified gives 49/24
- So, 15/40 + 20/12 = 49/24
In mixed form: 21/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40+20/12 15/40+40/12 15/80+20/12 15/40+20/24 45/40+20/12 15/40+60/12 15/40+20/36 75/40+20/12 15/40+20/60 15/40+20/84