Add 42/90 and 70/9
1st number: 42/90, 2nd number: 7 7/9
42/90 + 70/9 is 371/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
70/9 = 70 × 10/9 × 10 = 700/90 - Add the two like fractions:
42/90 + 700/90 = 42 + 700/90 = 742/90 - 742/90 simplified gives 371/45
- So, 42/90 + 70/9 = 371/45
In mixed form: 811/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+70/9 42/90+70/18 42/90+70/27 42/90+70/45 42/90+70/63