Add 18/25 and 3/21
18/25 + 3/21 is 151/175.
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,
3/21 = 3 × 25/21 × 25 = 75/525 - Add the two like fractions:
378/525 + 75/525 = 378 + 75/525 = 453/525 - 453/525 simplified gives 151/175
- So, 18/25 + 3/21 = 151/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/25+3/21 18/25+6/21 18/50+3/21 18/25+3/42 54/25+3/21 18/25+9/21 18/75+3/21 18/25+3/63 90/25+3/21 18/25+15/21