Add 8/21 and 42/25
1st number: 8/21, 2nd number: 1 17/25
8/21 + 42/25 is 1082/525.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
8/21 = 8 × 25/21 × 25 = 200/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
42/25 = 42 × 21/25 × 21 = 882/525 - Add the two like fractions:
200/525 + 882/525 = 200 + 882/525 = 1082/525 - So, 8/21 + 42/25 = 1082/525
In mixed form: 232/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21+42/25 8/21+84/25 8/42+42/25 8/21+42/50 24/21+42/25 8/63+42/25 8/21+42/75 40/21+42/25 56/21+42/25