Add 6/21 and 28/80
6/21 + 28/80 is 89/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
6/21 = 6 × 80/21 × 80 = 480/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
28/80 = 28 × 21/80 × 21 = 588/1680 - Add the two like fractions:
480/1680 + 588/1680 = 480 + 588/1680 = 1068/1680 - 1068/1680 simplified gives 89/140
- So, 6/21 + 28/80 = 89/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21+28/80 6/21+56/80 6/42+28/80 18/21+28/80 6/21+84/80 6/63+28/80 30/21+28/80 42/21+28/80