Add 25/75 and 25/21
1st number: 25/75, 2nd number: 1 4/21
25/75 + 25/21 is 32/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 75 × 7 = 525,
25/75 = 25 × 7/75 × 7 = 175/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
25/21 = 25 × 25/21 × 25 = 625/525 - Add the two like fractions:
175/525 + 625/525 = 175 + 625/525 = 800/525 - 800/525 simplified gives 32/21
- So, 25/75 + 25/21 = 32/21
In mixed form: 111/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/75+25/21 25/75+50/21 25/75+25/42 25/75+75/21 25/75+25/63