Add 15/90 and 18/5
1st number: 15/90, 2nd number: 3 3/5
15/90 + 18/5 is 113/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 5 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 5 × 18 = 90,
18/5 = 18 × 18/5 × 18 = 324/90 - Add the two like fractions:
15/90 + 324/90 = 15 + 324/90 = 339/90 - 339/90 simplified gives 113/30
- So, 15/90 + 18/5 = 113/30
In mixed form: 323/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90+18/5 15/90+36/5 15/90+18/10 45/90+18/5 15/90+54/5 15/90+18/15 75/90+18/5 15/90+90/5 15/90+18/25 15/90+18/35