Add 30/12 and 18/40
1st number: 2 6/12, 2nd number: 18/40
30/12 + 18/40 is 59/20.
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,
30/12 = 30 × 10/12 × 10 = 300/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
18/40 = 18 × 3/40 × 3 = 54/120 - Add the two like fractions:
300/120 + 54/120 = 300 + 54/120 = 354/120 - 354/120 simplified gives 59/20
- So, 30/12 + 18/40 = 59/20
In mixed form: 219/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12+18/40 30/12+36/40 30/24+18/40 30/12+18/80 90/12+18/40 30/12+54/40 30/36+18/40 30/12+90/40 30/60+18/40 30/84+18/40