Add 18/25 and 10/21
18/25 + 10/21 is 628/525.
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,
18/25 = 18 × 21/25 × 21 = 378/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
10/21 = 10 × 25/21 × 25 = 250/525 - Add the two like fractions:
378/525 + 250/525 = 378 + 250/525 = 628/525 - So, 18/25 + 10/21 = 628/525
In mixed form: 1103/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/25+10/21 18/25+20/21 18/50+10/21 18/25+10/42 54/25+10/21 18/25+30/21 18/75+10/21 18/25+10/63 90/25+10/21 18/25+50/21 18/25+70/21