Add 10/15 and 42/54
10/15 + 42/54 is 13/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 15 × 18 = 270,
10/15 = 10 × 18/15 × 18 = 180/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
42/54 = 42 × 5/54 × 5 = 210/270 - Add the two like fractions:
180/270 + 210/270 = 180 + 210/270 = 390/270 - 390/270 simplified gives 13/9
- So, 10/15 + 42/54 = 13/9
In mixed form: 14/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15+42/54 10/15+84/54 10/30+42/54 30/15+42/54 10/45+42/54 50/15+42/54 10/75+42/54 70/15+42/54