Add 28/72 and 27/90
28/72 + 27/90 is 31/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
28/72 = 28 × 5/72 × 5 = 140/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
27/90 = 27 × 4/90 × 4 = 108/360 - Add the two like fractions:
140/360 + 108/360 = 140 + 108/360 = 248/360 - 248/360 simplified gives 31/45
- So, 28/72 + 27/90 = 31/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/72+27/90 28/72+54/90 84/72+27/90 28/72+81/90