Add 12/25 and 42/21
1st number: 12/25, 2nd number: 2 0/21
12/25 + 42/21 is 62/25.
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,
12/25 = 12 × 21/25 × 21 = 252/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
42/21 = 42 × 25/21 × 25 = 1050/525 - Add the two like fractions:
252/525 + 1050/525 = 252 + 1050/525 = 1302/525 - 1302/525 simplified gives 62/25
- So, 12/25 + 42/21 = 62/25
In mixed form: 212/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/25+42/21 12/25+84/21 12/50+42/21 36/25+42/21 12/75+42/21 12/25+42/63 60/25+42/21 84/25+42/21