Add 28/54 and 70/90
28/54 + 70/90 is 35/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 90 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 54 × 5 = 270,
28/54 = 28 × 5/54 × 5 = 140/270 - Likewise, for the 2nd fraction, since 90 × 3 = 270,
70/90 = 70 × 3/90 × 3 = 210/270 - Add the two like fractions:
140/270 + 210/270 = 140 + 210/270 = 350/270 - 350/270 simplified gives 35/27
- So, 28/54 + 70/90 = 35/27
In mixed form: 18/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/54+70/90 84/54+70/90