Add 84/25 and 25/21
1st number: 3 9/25, 2nd number: 1 4/21
84/25 + 25/21 is 2389/525.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 25 × 21 = 525,
84/25 = 84 × 21/25 × 21 = 1764/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
25/21 = 25 × 25/21 × 25 = 625/525 - Add the two like fractions:
1764/525 + 625/525 = 1764 + 625/525 = 2389/525 - So, 84/25 + 25/21 = 2389/525
In mixed form: 4289/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/25+50/21 84/50+25/21 84/25+25/42 84/25+75/21 84/75+25/21 84/25+25/63