Add 70/75 and 28/90
70/75 + 28/90 is 56/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
70/75 = 70 × 6/75 × 6 = 420/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
28/90 = 28 × 5/90 × 5 = 140/450 - Add the two like fractions:
420/450 + 140/450 = 420 + 140/450 = 560/450 - 560/450 simplified gives 56/45
- So, 70/75 + 28/90 = 56/45
In mixed form: 111/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/75+56/90 70/75+84/90