Add 42/20 and 8/18
1st number: 2 2/20, 2nd number: 8/18
42/20 + 8/18 is 229/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 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 18 × 10 = 180,
8/18 = 8 × 10/18 × 10 = 80/180 - Add the two like fractions:
378/180 + 80/180 = 378 + 80/180 = 458/180 - 458/180 simplified gives 229/90
- So, 42/20 + 8/18 = 229/90
In mixed form: 249/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+8/18 42/20+16/18 42/40+8/18 42/20+8/36 42/20+24/18 42/60+8/18 42/20+8/54 42/20+40/18 42/20+8/90 42/20+56/18