Add 21/14 and 84/28
1st number: 1 7/14, 2nd number: 3 0/28
21/14 + 84/28 is 9/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 28 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 14 × 2 = 28,
21/14 = 21 × 2/14 × 2 = 42/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
84/28 = 84 × 1/28 × 1 = 84/28 - Add the two like fractions:
42/28 + 84/28 = 42 + 84/28 = 126/28 - 126/28 simplified gives 9/2
- So, 21/14 + 84/28 = 9/2
In mixed form: 41/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+84/28 21/28+84/28 21/14+84/56 63/14+84/28 21/42+84/28 21/70+84/28 21/98+84/28