Add 28/18 and 70/15
1st number: 1 10/18, 2nd number: 4 10/15
28/18 + 70/15 is 56/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
28/18 = 28 × 5/18 × 5 = 140/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
70/15 = 70 × 6/15 × 6 = 420/90 - Add the two like fractions:
140/90 + 420/90 = 140 + 420/90 = 560/90 - 560/90 simplified gives 56/9
- So, 28/18 + 70/15 = 56/9
In mixed form: 62/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18+70/15 28/36+70/15 28/18+70/30 84/18+70/15 28/54+70/15 28/18+70/45 28/90+70/15 28/18+70/75