Add 30/15 and 90/9
1st number: 2 0/15, 2nd number: 10 0/9
30/15 + 90/9 is 12/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
30/15 = 30 × 3/15 × 3 = 90/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
90/9 = 90 × 5/9 × 5 = 450/45 - Add the two like fractions:
90/45 + 450/45 = 90 + 450/45 = 540/45 - 540/45 simplified gives 12/1
- So, 30/15 + 90/9 = 12/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/15+90/9 30/15+90/18 90/15+90/9 30/45+90/9 30/15+90/27 30/75+90/9 30/15+90/45 30/15+90/63