Add 84/18 and 42/8
1st number: 4 12/18, 2nd number: 5 2/8
84/18 + 42/8 is 119/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
84/18 = 84 × 4/18 × 4 = 336/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
42/8 = 42 × 9/8 × 9 = 378/72 - Add the two like fractions:
336/72 + 378/72 = 336 + 378/72 = 714/72 - 714/72 simplified gives 119/12
- So, 84/18 + 42/8 = 119/12
In mixed form: 911/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18+84/8 84/36+42/8 84/18+42/16 84/54+42/8 84/18+42/24 84/90+42/8 84/18+42/40 84/18+42/56