Add 18/12 and 18/40
1st number: 1 6/12, 2nd number: 18/40
18/12 + 18/40 is 39/20.
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,
18/12 = 18 × 10/12 × 10 = 180/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
18/40 = 18 × 3/40 × 3 = 54/120 - Add the two like fractions:
180/120 + 54/120 = 180 + 54/120 = 234/120 - 234/120 simplified gives 39/20
- So, 18/12 + 18/40 = 39/20
In mixed form: 119/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/12+18/40 18/12+36/40 18/24+18/40 18/12+18/80 54/12+18/40 18/12+54/40 18/36+18/40 90/12+18/40 18/12+90/40 18/60+18/40 18/84+18/40