Add 28/84 and 90/75
1st number: 28/84, 2nd number: 1 15/75
28/84 + 90/75 is 23/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 75 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 84 × 25 = 2100,
28/84 = 28 × 25/84 × 25 = 700/2100 - Likewise, for the 2nd fraction, since 75 × 28 = 2100,
90/75 = 90 × 28/75 × 28 = 2520/2100 - Add the two like fractions:
700/2100 + 2520/2100 = 700 + 2520/2100 = 3220/2100 - 3220/2100 simplified gives 23/15
- So, 28/84 + 90/75 = 23/15
In mixed form: 18/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/84+90/75