Add 18/42 and 9/5
1st number: 18/42, 2nd number: 1 4/5
18/42 + 9/5 is 78/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 5 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
18/42 = 18 × 5/42 × 5 = 90/210 - Likewise, for the 2nd fraction, since 5 × 42 = 210,
9/5 = 9 × 42/5 × 42 = 378/210 - Add the two like fractions:
90/210 + 378/210 = 90 + 378/210 = 468/210 - 468/210 simplified gives 78/35
- So, 18/42 + 9/5 = 78/35
In mixed form: 28/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/42+9/5 18/42+18/5 18/84+9/5 18/42+9/10 54/42+9/5 18/42+27/5 18/42+9/15 90/42+9/5 18/42+45/5 18/42+9/25 18/42+63/5 18/42+9/35