Add 20/75 and 25/21
1st number: 20/75, 2nd number: 1 4/21
20/75 + 25/21 is 51/35.
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,
20/75 = 20 × 7/75 × 7 = 140/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
25/21 = 25 × 25/21 × 25 = 625/525 - Add the two like fractions:
140/525 + 625/525 = 140 + 625/525 = 765/525 - 765/525 simplified gives 51/35
- So, 20/75 + 25/21 = 51/35
In mixed form: 116/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/75+25/21 20/75+50/21 20/75+25/42 60/75+25/21 20/75+75/21 20/75+25/63