Add 15/18 and 25/30
15/18 + 25/30 is 5/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
15/18 = 15 × 5/18 × 5 = 75/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
25/30 = 25 × 3/30 × 3 = 75/90 - Add the two like fractions:
75/90 + 75/90 = 75 + 75/90 = 150/90 - 150/90 simplified gives 5/3
- So, 15/18 + 25/30 = 5/3
In mixed form: 12/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18+25/30 15/18+50/30 15/36+25/30 15/18+25/60 45/18+25/30 15/18+75/30 15/54+25/30 15/18+25/90 75/18+25/30 15/90+25/30