Add 15/18 and 90/25
1st number: 15/18, 2nd number: 3 15/25
15/18 + 90/25 is 133/30.
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,
90/25 = 90 × 18/25 × 18 = 1620/450 - Add the two like fractions:
375/450 + 1620/450 = 375 + 1620/450 = 1995/450 - 1995/450 simplified gives 133/30
- So, 15/18 + 90/25 = 133/30
In mixed form: 413/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18+90/25 15/36+90/25 15/18+90/50 45/18+90/25 15/54+90/25 15/18+90/75 75/18+90/25 15/90+90/25