Add 75/21 and 30/28
1st number: 3 12/21, 2nd number: 1 2/28
75/21 + 30/28 is 65/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
75/21 = 75 × 4/21 × 4 = 300/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
30/28 = 30 × 3/28 × 3 = 90/84 - Add the two like fractions:
300/84 + 90/84 = 300 + 90/84 = 390/84 - 390/84 simplified gives 65/14
- So, 75/21 + 30/28 = 65/14
In mixed form: 49/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21+60/28 75/42+30/28 75/21+30/56 75/21+90/28 75/63+30/28 75/21+30/84