Add 21/84 and 28/25
1st number: 21/84, 2nd number: 1 3/25
21/84 + 28/25 is 137/100.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 25 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 84 × 25 = 2100,
21/84 = 21 × 25/84 × 25 = 525/2100 - Likewise, for the 2nd fraction, since 25 × 84 = 2100,
28/25 = 28 × 84/25 × 84 = 2352/2100 - Add the two like fractions:
525/2100 + 2352/2100 = 525 + 2352/2100 = 2877/2100 - 2877/2100 simplified gives 137/100
- So, 21/84 + 28/25 = 137/100
In mixed form: 137/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84+28/25 21/84+56/25 21/84+28/50 63/84+28/25 21/84+84/25 21/84+28/75