Add 10/15 and 42/90
10/15 + 42/90 is 17/15.
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,
10/15 = 10 × 6/15 × 6 = 60/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Add the two like fractions:
60/90 + 42/90 = 60 + 42/90 = 102/90 - 102/90 simplified gives 17/15
- So, 10/15 + 42/90 = 17/15
In mixed form: 12/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15+42/90 10/15+84/90 10/30+42/90 30/15+42/90 10/45+42/90 50/15+42/90 10/75+42/90 70/15+42/90