Add 40/20 and 15/12
1st number: 2 0/20, 2nd number: 1 3/12
40/20 + 15/12 is 13/4.
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,
40/20 = 40 × 3/20 × 3 = 120/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
15/12 = 15 × 5/12 × 5 = 75/60 - Add the two like fractions:
120/60 + 75/60 = 120 + 75/60 = 195/60 - 195/60 simplified gives 13/4
- So, 40/20 + 15/12 = 13/4
In mixed form: 31/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/20+15/12 40/20+30/12 40/20+15/24 40/20+45/12 40/60+15/12 40/20+15/36 40/20+75/12 40/20+15/60 40/20+15/84