Add 15/25 and 20/45
15/25 + 20/45 is 47/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 45 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 25 × 9 = 225,
15/25 = 15 × 9/25 × 9 = 135/225 - Likewise, for the 2nd fraction, since 45 × 5 = 225,
20/45 = 20 × 5/45 × 5 = 100/225 - Add the two like fractions:
135/225 + 100/225 = 135 + 100/225 = 235/225 - 235/225 simplified gives 47/45
- So, 15/25 + 20/45 = 47/45
In mixed form: 12/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/25+20/45 15/25+40/45 15/50+20/45 15/25+20/90 45/25+20/45 15/25+60/45 15/75+20/45 75/25+20/45