Add 3/12 and 40/90
3/12 + 40/90 is 25/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
3/12 = 3 × 15/12 × 15 = 45/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
40/90 = 40 × 2/90 × 2 = 80/180 - Add the two like fractions:
45/180 + 80/180 = 45 + 80/180 = 125/180 - 125/180 simplified gives 25/36
- So, 3/12 + 40/90 = 25/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+40/90 3/12+80/90 3/24+40/90 9/12+40/90 3/36+40/90 15/12+40/90 3/60+40/90 21/12+40/90 3/84+40/90