Add 15/45 and 45/80
15/45 + 45/80 is 43/48.
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,
45/80 = 45 × 9/80 × 9 = 405/720 - Add the two like fractions:
240/720 + 405/720 = 240 + 405/720 = 645/720 - 645/720 simplified gives 43/48
- So, 15/45 + 45/80 = 43/48
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/45+45/80 15/45+90/80 15/90+45/80 75/45+45/80