Add 42/12 and 10/90
1st number: 3 6/12, 2nd number: 10/90
42/12 + 10/90 is 65/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
42/12 = 42 × 15/12 × 15 = 630/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
10/90 = 10 × 2/90 × 2 = 20/180 - Add the two like fractions:
630/180 + 20/180 = 630 + 20/180 = 650/180 - 650/180 simplified gives 65/18
- So, 42/12 + 10/90 = 65/18
In mixed form: 311/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12+10/90 42/12+20/90 42/24+10/90 42/12+30/90 42/36+10/90 42/12+50/90 42/60+10/90 42/12+70/90 42/84+10/90