Add 18/9 and 42/90
1st number: 2 0/9, 2nd number: 42/90
18/9 + 42/90 is 37/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,
18/9 = 18 × 10/9 × 10 = 180/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Add the two like fractions:
180/90 + 42/90 = 180 + 42/90 = 222/90 - 222/90 simplified gives 37/15
- So, 18/9 + 42/90 = 37/15
In mixed form: 27/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/9+42/90 18/9+84/90 54/9+42/90 18/27+42/90 90/9+42/90 18/45+42/90 18/63+42/90