Add 10/42 and 75/21
1st number: 10/42, 2nd number: 3 12/21
10/42 + 75/21 is 80/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
10/42 = 10 × 1/42 × 1 = 10/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
75/21 = 75 × 2/21 × 2 = 150/42 - Add the two like fractions:
10/42 + 150/42 = 10 + 150/42 = 160/42 - 160/42 simplified gives 80/21
- So, 10/42 + 75/21 = 80/21
In mixed form: 317/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42+75/21 10/84+75/21 10/42+75/42 30/42+75/21 10/42+75/63 50/42+75/21 70/42+75/21