Add 6/20 and 28/42
6/20 + 28/42 is 29/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
6/20 = 6 × 21/20 × 21 = 126/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
28/42 = 28 × 10/42 × 10 = 280/420 - Add the two like fractions:
126/420 + 280/420 = 126 + 280/420 = 406/420 - 406/420 simplified gives 29/30
- So, 6/20 + 28/42 = 29/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/20+28/42 6/20+56/42 6/40+28/42 6/20+28/84 18/20+28/42 6/20+84/42 6/60+28/42 30/20+28/42 42/20+28/42