Add 18/40 and 42/24
1st number: 18/40, 2nd number: 1 18/24
18/40 + 42/24 is 11/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
18/40 = 18 × 3/40 × 3 = 54/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
42/24 = 42 × 5/24 × 5 = 210/120 - Add the two like fractions:
54/120 + 210/120 = 54 + 210/120 = 264/120 - 264/120 simplified gives 11/5
- So, 18/40 + 42/24 = 11/5
In mixed form: 21/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40+42/24 18/40+84/24 18/80+42/24 18/40+42/48 54/40+42/24 18/40+42/72 90/40+42/24