Add 3/12 and 20/40
3/12 + 20/40 is 3/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 12 × 10 = 120,
3/12 = 3 × 10/12 × 10 = 30/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
20/40 = 20 × 3/40 × 3 = 60/120 - Add the two like fractions:
30/120 + 60/120 = 30 + 60/120 = 90/120 - 90/120 simplified gives 3/4
- So, 3/12 + 20/40 = 3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+20/40 3/24+20/40 3/12+20/80 9/12+20/40 3/12+60/40 3/36+20/40 15/12+20/40 3/60+20/40 21/12+20/40 3/84+20/40