Add 42/90 and 20/9
1st number: 42/90, 2nd number: 2 2/9
42/90 + 20/9 is 121/45.
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,
20/9 = 20 × 10/9 × 10 = 200/90 - Add the two like fractions:
42/90 + 200/90 = 42 + 200/90 = 242/90 - 242/90 simplified gives 121/45
- So, 42/90 + 20/9 = 121/45
In mixed form: 231/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+20/9 42/90+40/9 42/90+20/18 42/90+60/9 42/90+20/27 42/90+20/45 42/90+20/63