Add 15/45 and 25/80
15/45 + 25/80 is 31/48.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
15/45 = 15 × 16/45 × 16 = 240/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
25/80 = 25 × 9/80 × 9 = 225/720 - Add the two like fractions:
240/720 + 225/720 = 240 + 225/720 = 465/720 - 465/720 simplified gives 31/48
- So, 15/45 + 25/80 = 31/48
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/45+25/80 15/45+50/80 15/90+25/80 15/45+75/80 75/45+25/80