Add 42/9 and 20/28
1st number: 4 6/9, 2nd number: 20/28
42/9 + 20/28 is 113/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 9 × 28 = 252,
42/9 = 42 × 28/9 × 28 = 1176/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
20/28 = 20 × 9/28 × 9 = 180/252 - Add the two like fractions:
1176/252 + 180/252 = 1176 + 180/252 = 1356/252 - 1356/252 simplified gives 113/21
- So, 42/9 + 20/28 = 113/21
In mixed form: 58/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9+20/28 42/9+40/28 42/18+20/28 42/9+20/56 42/9+60/28 42/27+20/28 42/9+20/84 42/45+20/28 42/63+20/28