Add 28/21 and 10/75
1st number: 1 7/21, 2nd number: 10/75
28/21 + 10/75 is 22/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 75 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
28/21 = 28 × 25/21 × 25 = 700/525 - Likewise, for the 2nd fraction, since 75 × 7 = 525,
10/75 = 10 × 7/75 × 7 = 70/525 - Add the two like fractions:
700/525 + 70/525 = 700 + 70/525 = 770/525 - 770/525 simplified gives 22/15
- So, 28/21 + 10/75 = 22/15
In mixed form: 17/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+10/75 28/21+20/75 28/42+10/75 84/21+10/75 28/21+30/75 28/63+10/75 28/21+50/75 28/21+70/75