Add 5/28 and 18/21
5/28 + 18/21 is 29/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
5/28 = 5 × 3/28 × 3 = 15/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
18/21 = 18 × 4/21 × 4 = 72/84 - Add the two like fractions:
15/84 + 72/84 = 15 + 72/84 = 87/84 - 87/84 simplified gives 29/28
- So, 5/28 + 18/21 = 29/28
In mixed form: 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/28+18/21 5/28+36/21 5/56+18/21 5/28+18/42 15/28+18/21 5/28+54/21 5/84+18/21 5/28+18/63 25/28+18/21 5/28+90/21 35/28+18/21