Add 42/9 and 15/30
1st number: 4 6/9, 2nd number: 15/30
42/9 + 15/30 is 31/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,
42/9 = 42 × 10/9 × 10 = 420/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
15/30 = 15 × 3/30 × 3 = 45/90 - Add the two like fractions:
420/90 + 45/90 = 420 + 45/90 = 465/90 - 465/90 simplified gives 31/6
- So, 42/9 + 15/30 = 31/6
In mixed form: 51/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9+15/30 42/18+15/30 42/9+15/60 42/9+45/30 42/27+15/30 42/9+15/90 42/9+75/30 42/45+15/30 42/63+15/30