Add 45/80 and 28/45
45/80 + 28/45 is 853/720.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
45/80 = 45 × 9/80 × 9 = 405/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
28/45 = 28 × 16/45 × 16 = 448/720 - Add the two like fractions:
405/720 + 448/720 = 405 + 448/720 = 853/720 - So, 45/80 + 28/45 = 853/720
In mixed form: 1133/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80+28/45 45/80+56/45 45/80+28/90 45/80+84/45