Add 30/15 and 70/90
1st number: 2 0/15, 2nd number: 70/90
30/15 + 70/90 is 25/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
30/15 = 30 × 6/15 × 6 = 180/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
70/90 = 70 × 1/90 × 1 = 70/90 - Add the two like fractions:
180/90 + 70/90 = 180 + 70/90 = 250/90 - 250/90 simplified gives 25/9
- So, 30/15 + 70/90 = 25/9
In mixed form: 27/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/15+70/90 90/15+70/90 30/45+70/90 30/75+70/90