Add 15/18 and 25/45
15/18 + 25/45 is 25/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 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 45 × 2 = 90,
25/45 = 25 × 2/45 × 2 = 50/90 - Add the two like fractions:
75/90 + 50/90 = 75 + 50/90 = 125/90 - 125/90 simplified gives 25/18
- So, 15/18 + 25/45 = 25/18
In mixed form: 17/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18+25/45 15/18+50/45 15/36+25/45 15/18+25/90 45/18+25/45 15/18+75/45 15/54+25/45 75/18+25/45 15/90+25/45