Add 28/84 and 8/72
28/84 + 8/72 is 4/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 84 × 6 = 504,
28/84 = 28 × 6/84 × 6 = 168/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
8/72 = 8 × 7/72 × 7 = 56/504 - Add the two like fractions:
168/504 + 56/504 = 168 + 56/504 = 224/504 - 224/504 simplified gives 4/9
- So, 28/84 + 8/72 = 4/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/84+8/72 28/84+16/72 28/84+24/72 28/84+40/72 28/84+56/72