Add 4/28 and 21/42
4/28 + 21/42 is 9/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
4/28 = 4 × 3/28 × 3 = 12/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
21/42 = 21 × 2/42 × 2 = 42/84 - Add the two like fractions:
12/84 + 42/84 = 12 + 42/84 = 54/84 - 54/84 simplified gives 9/14
- So, 4/28 + 21/42 = 9/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/28+21/42 4/56+21/42 4/28+21/84 12/28+21/42 4/28+63/42 4/84+21/42 20/28+21/42