Add 18/25 and 4/21
18/25 + 4/21 is 478/525.
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,
4/21 = 4 × 25/21 × 25 = 100/525 - Add the two like fractions:
378/525 + 100/525 = 378 + 100/525 = 478/525 - So, 18/25 + 4/21 = 478/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/25+4/21 18/25+8/21 18/50+4/21 18/25+4/42 54/25+4/21 18/25+12/21 18/75+4/21 18/25+4/63 90/25+4/21 18/25+20/21 18/25+28/21