Add 15/90 and 30/18
1st number: 15/90, 2nd number: 1 12/18
15/90 + 30/18 is 11/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
15/90 = 15 × 1/90 × 1 = 15/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
30/18 = 30 × 5/18 × 5 = 150/90 - Add the two like fractions:
15/90 + 150/90 = 15 + 150/90 = 165/90 - 165/90 simplified gives 11/6
- So, 15/90 + 30/18 = 11/6
In mixed form: 15/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90+30/18 15/90+60/18 15/90+30/36 45/90+30/18 15/90+90/18 15/90+30/54 75/90+30/18 15/90+30/90