Add 15/18 and 45/25
1st number: 15/18, 2nd number: 1 20/25
15/18 + 45/25 is 79/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 25 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 18 × 25 = 450,
15/18 = 15 × 25/18 × 25 = 375/450 - Likewise, for the 2nd fraction, since 25 × 18 = 450,
45/25 = 45 × 18/25 × 18 = 810/450 - Add the two like fractions:
375/450 + 810/450 = 375 + 810/450 = 1185/450 - 1185/450 simplified gives 79/30
- So, 15/18 + 45/25 = 79/30
In mixed form: 219/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18+45/25 15/18+90/25 15/36+45/25 15/18+45/50 45/18+45/25 15/54+45/25 15/18+45/75 75/18+45/25 15/90+45/25