Add 42/20 and 27/9
1st number: 2 2/20, 2nd number: 3 0/9
42/20 + 27/9 is 51/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
42/20 = 42 × 9/20 × 9 = 378/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
27/9 = 27 × 20/9 × 20 = 540/180 - Add the two like fractions:
378/180 + 540/180 = 378 + 540/180 = 918/180 - 918/180 simplified gives 51/10
- So, 42/20 + 27/9 = 51/10
In mixed form: 51/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+27/9 42/20+54/9 42/40+27/9 42/20+27/18 42/20+81/9 42/60+27/9 42/20+27/45 42/20+27/63