Add 15/80 and 4/9
15/80 + 4/9 is 91/144.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
15/80 = 15 × 9/80 × 9 = 135/720 - Likewise, for the 2nd fraction, since 9 × 80 = 720,
4/9 = 4 × 80/9 × 80 = 320/720 - Add the two like fractions:
135/720 + 320/720 = 135 + 320/720 = 455/720 - 455/720 simplified gives 91/144
- So, 15/80 + 4/9 = 91/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/80+4/9 15/80+8/9 15/80+4/18 45/80+4/9 15/80+12/9 15/80+4/27 75/80+4/9 15/80+20/9 15/80+4/45 15/80+28/9 15/80+4/63