Add 32/21 and 28/80
1st number: 1 11/21, 2nd number: 28/80
32/21 + 28/80 is 787/420.
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,
32/21 = 32 × 80/21 × 80 = 2560/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
28/80 = 28 × 21/80 × 21 = 588/1680 - Add the two like fractions:
2560/1680 + 588/1680 = 2560 + 588/1680 = 3148/1680 - 3148/1680 simplified gives 787/420
- So, 32/21 + 28/80 = 787/420
In mixed form: 1367/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/21+28/80 32/21+56/80 32/42+28/80 96/21+28/80 32/21+84/80 32/63+28/80