Add 75/21 and 75/7
1st number: 3 12/21, 2nd number: 10 5/7
75/21 + 75/7 is 100/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
75/21 = 75 × 1/21 × 1 = 75/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
75/7 = 75 × 3/7 × 3 = 225/21 - Add the two like fractions:
75/21 + 225/21 = 75 + 225/21 = 300/21 - 300/21 simplified gives 100/7
- So, 75/21 + 75/7 = 100/7
In mixed form: 142/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/42+75/7 75/21+75/14 75/63+75/7 75/21+75/21 75/21+75/35 75/21+75/49