Add 21/25 and 9/12
21/25 + 9/12 is 159/100.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 12 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 25 × 12 = 300,
21/25 = 21 × 12/25 × 12 = 252/300 - Likewise, for the 2nd fraction, since 12 × 25 = 300,
9/12 = 9 × 25/12 × 25 = 225/300 - Add the two like fractions:
252/300 + 225/300 = 252 + 225/300 = 477/300 - 477/300 simplified gives 159/100
- So, 21/25 + 9/12 = 159/100
In mixed form: 159/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+9/12 21/25+18/12 21/50+9/12 21/25+9/24 63/25+9/12 21/25+27/12 21/75+9/12 21/25+9/36 21/25+45/12 21/25+9/60 21/25+63/12 21/25+9/84