Add 20/90 and 42/6
1st number: 20/90, 2nd number: 7 0/6
20/90 + 42/6 is 65/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 6 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Likewise, for the 2nd fraction, since 6 × 15 = 90,
42/6 = 42 × 15/6 × 15 = 630/90 - Add the two like fractions:
20/90 + 630/90 = 20 + 630/90 = 650/90 - 650/90 simplified gives 65/9
- So, 20/90 + 42/6 = 65/9
In mixed form: 72/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90+42/6 20/90+84/6 20/90+42/12 60/90+42/6 20/90+42/18 20/90+42/30