Add 28/36 and 8/90
28/36 + 8/90 is 13/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
28/36 = 28 × 5/36 × 5 = 140/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
8/90 = 8 × 2/90 × 2 = 16/180 - Add the two like fractions:
140/180 + 16/180 = 140 + 16/180 = 156/180 - 156/180 simplified gives 13/15
- So, 28/36 + 8/90 = 13/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/36+8/90 28/36+16/90 28/72+8/90 84/36+8/90 28/36+24/90 28/36+40/90 28/36+56/90