Add 20/72 and 4/9
20/72 + 4/9 is 13/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
20/72 = 20 × 1/72 × 1 = 20/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
4/9 = 4 × 8/9 × 8 = 32/72 - Add the two like fractions:
20/72 + 32/72 = 20 + 32/72 = 52/72 - 52/72 simplified gives 13/18
- So, 20/72 + 4/9 = 13/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/72+4/9 20/72+8/9 20/72+4/18 60/72+4/9 20/72+12/9 20/72+4/27 20/72+20/9 20/72+4/45 20/72+28/9 20/72+4/63