Add 21/14 and 21/84
1st number: 1 7/14, 2nd number: 21/84
21/14 + 21/84 is 7/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 14 × 6 = 84,
21/14 = 21 × 6/14 × 6 = 126/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Add the two like fractions:
126/84 + 21/84 = 126 + 21/84 = 147/84 - 147/84 simplified gives 7/4
- So, 21/14 + 21/84 = 7/4
In mixed form: 13/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+21/84 21/14+42/84 21/28+21/84 63/14+21/84 21/14+63/84 21/42+21/84 21/70+21/84 21/98+21/84