Add 21/42 and 45/7
1st number: 21/42, 2nd number: 6 3/7
21/42 + 45/7 is 97/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
21/42 = 21 × 1/42 × 1 = 21/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
45/7 = 45 × 6/7 × 6 = 270/42 - Add the two like fractions:
21/42 + 270/42 = 21 + 270/42 = 291/42 - 291/42 simplified gives 97/14
- So, 21/42 + 45/7 = 97/14
In mixed form: 613/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42+90/7 21/84+45/7 21/42+45/14 63/42+45/7 21/42+45/21 21/42+45/35 21/42+45/49