Add 42/25 and 25/21
1st number: 1 17/25, 2nd number: 1 4/21
42/25 + 25/21 is 1507/525.
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,
42/25 = 42 × 21/25 × 21 = 882/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
25/21 = 25 × 25/21 × 25 = 625/525 - Add the two like fractions:
882/525 + 625/525 = 882 + 625/525 = 1507/525 - So, 42/25 + 25/21 = 1507/525
In mixed form: 2457/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/25+25/21 42/25+50/21 42/50+25/21 42/25+25/42 42/25+75/21 42/75+25/21 42/25+25/63