Add 42/18 and 15/90
1st number: 2 6/18, 2nd number: 15/90
42/18 + 15/90 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
42/18 = 42 × 5/18 × 5 = 210/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
15/90 = 15 × 1/90 × 1 = 15/90 - Add the two like fractions:
210/90 + 15/90 = 210 + 15/90 = 225/90 - 225/90 simplified gives 5/2
- So, 42/18 + 15/90 = 5/2
In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18+15/90 42/18+30/90 42/36+15/90 42/18+45/90 42/54+15/90 42/18+75/90 42/90+15/90