Add 3/12 and 4/40
3/12 + 4/40 is 7/20.
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,
4/40 = 4 × 3/40 × 3 = 12/120 - Add the two like fractions:
30/120 + 12/120 = 30 + 12/120 = 42/120 - 42/120 simplified gives 7/20
- So, 3/12 + 4/40 = 7/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+4/40 3/12+8/40 3/24+4/40 3/12+4/80 9/12+4/40 3/12+12/40 3/36+4/40 15/12+4/40 3/12+20/40 3/60+4/40 21/12+4/40 3/12+28/40 3/84+4/40