Add 84/21 and 45/7
1st number: 4 0/21, 2nd number: 6 3/7
84/21 + 45/7 is 73/7.
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,
84/21 = 84 × 1/21 × 1 = 84/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
45/7 = 45 × 3/7 × 3 = 135/21 - Add the two like fractions:
84/21 + 135/21 = 84 + 135/21 = 219/21 - 219/21 simplified gives 73/7
- So, 84/21 + 45/7 = 73/7
In mixed form: 103/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+90/7 84/42+45/7 84/21+45/14 84/63+45/7 84/21+45/21 84/21+45/35 84/21+45/49