Add 9/15 and 42/45
9/15 + 42/45 is 23/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
9/15 = 9 × 3/15 × 3 = 27/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
42/45 = 42 × 1/45 × 1 = 42/45 - Add the two like fractions:
27/45 + 42/45 = 27 + 42/45 = 69/45 - 69/45 simplified gives 23/15
- So, 9/15 + 42/45 = 23/15
In mixed form: 18/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15+42/45 9/15+84/45 9/30+42/45 9/15+42/90 27/15+42/45 9/45+42/45 45/15+42/45 9/75+42/45 63/15+42/45