Add 5/15 and 20/45
5/15 + 20/45 is 7/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
5/15 = 5 × 3/15 × 3 = 15/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
20/45 = 20 × 1/45 × 1 = 20/45 - Add the two like fractions:
15/45 + 20/45 = 15 + 20/45 = 35/45 - 35/45 simplified gives 7/9
- So, 5/15 + 20/45 = 7/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/15+20/45 5/15+40/45 5/30+20/45 5/15+20/90 5/15+60/45 5/45+20/45 25/15+20/45 5/75+20/45 35/15+20/45