Add 70/18 and 9/15
1st number: 3 16/18, 2nd number: 9/15
70/18 + 9/15 is 202/45.
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,
70/18 = 70 × 5/18 × 5 = 350/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
9/15 = 9 × 6/15 × 6 = 54/90 - Add the two like fractions:
350/90 + 54/90 = 350 + 54/90 = 404/90 - 404/90 simplified gives 202/45
- So, 70/18 + 9/15 = 202/45
In mixed form: 422/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/18+18/15 70/36+9/15 70/18+9/30 70/18+27/15 70/54+9/15 70/18+9/45 70/18+45/15 70/90+9/15 70/18+9/75 70/18+63/15