Add 75/21 and 15/10
1st number: 3 12/21, 2nd number: 1 5/10
75/21 + 15/10 is 71/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
75/21 = 75 × 10/21 × 10 = 750/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
15/10 = 15 × 21/10 × 21 = 315/210 - Add the two like fractions:
750/210 + 315/210 = 750 + 315/210 = 1065/210 - 1065/210 simplified gives 71/14
- So, 75/21 + 15/10 = 71/14
In mixed form: 51/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21+30/10 75/42+15/10 75/21+15/20 75/21+45/10 75/63+15/10 75/21+15/30 75/21+75/10 75/21+15/50 75/21+15/70