Add 5/80 and 4/72
5/80 + 4/72 is 17/144.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 72 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
5/80 = 5 × 9/80 × 9 = 45/720 - Likewise, for the 2nd fraction, since 72 × 10 = 720,
4/72 = 4 × 10/72 × 10 = 40/720 - Add the two like fractions:
45/720 + 40/720 = 45 + 40/720 = 85/720 - 85/720 simplified gives 17/144
- So, 5/80 + 4/72 = 17/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/80+4/72 5/80+8/72 15/80+4/72 5/80+12/72 25/80+4/72 5/80+20/72 35/80+4/72 5/80+28/72