Add 18/4 and 42/8
1st number: 4 2/4, 2nd number: 5 2/8
18/4 + 42/8 is 39/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 8 is 8
Next, find the equivalent fraction of both fractional numbers with denominator 8 - For the 1st fraction, since 4 × 2 = 8,
18/4 = 18 × 2/4 × 2 = 36/8 - Likewise, for the 2nd fraction, since 8 × 1 = 8,
42/8 = 42 × 1/8 × 1 = 42/8 - Add the two like fractions:
36/8 + 42/8 = 36 + 42/8 = 78/8 - 78/8 simplified gives 39/4
- So, 18/4 + 42/8 = 39/4
In mixed form: 93/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/4+42/8 18/4+84/8 18/8+42/8 18/4+42/16 54/4+42/8 18/12+42/8 18/4+42/24 90/4+42/8 18/20+42/8 18/4+42/40 18/28+42/8 18/4+42/56