Add 25/84 and 27/21
1st number: 25/84, 2nd number: 1 6/21
25/84 + 27/21 is 19/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
25/84 = 25 × 1/84 × 1 = 25/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
27/21 = 27 × 4/21 × 4 = 108/84 - Add the two like fractions:
25/84 + 108/84 = 25 + 108/84 = 133/84 - 133/84 simplified gives 19/12
- So, 25/84 + 27/21 = 19/12
In mixed form: 17/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/84+27/21 25/84+54/21 25/84+27/42 75/84+27/21 25/84+81/21 25/84+27/63