Add 20/21 and 28/48
20/21 + 28/48 is 43/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 48 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 21 × 16 = 336,
20/21 = 20 × 16/21 × 16 = 320/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
28/48 = 28 × 7/48 × 7 = 196/336 - Add the two like fractions:
320/336 + 196/336 = 320 + 196/336 = 516/336 - 516/336 simplified gives 43/28
- So, 20/21 + 28/48 = 43/28
In mixed form: 115/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+28/48 20/21+56/48 20/42+28/48 20/21+28/96 60/21+28/48 20/21+84/48 20/63+28/48