Add 25/45 and 28/80
25/45 + 28/80 is 163/180.
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,
25/45 = 25 × 16/45 × 16 = 400/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
28/80 = 28 × 9/80 × 9 = 252/720 - Add the two like fractions:
400/720 + 252/720 = 400 + 252/720 = 652/720 - 652/720 simplified gives 163/180
- So, 25/45 + 28/80 = 163/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/45+28/80 25/45+56/80 25/90+28/80 75/45+28/80 25/45+84/80