Add 10/45 and 15/90
10/45 + 15/90 is 7/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
10/45 = 10 × 2/45 × 2 = 20/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
15/90 = 15 × 1/90 × 1 = 15/90 - Add the two like fractions:
20/90 + 15/90 = 20 + 15/90 = 35/90 - 35/90 simplified gives 7/18
- So, 10/45 + 15/90 = 7/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/45+15/90 10/45+30/90 10/90+15/90 30/45+15/90 10/45+45/90 50/45+15/90 10/45+75/90 70/45+15/90