Add 84/63 and 9/42
1st number: 1 21/63, 2nd number: 9/42
84/63 + 9/42 is 65/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
84/63 = 84 × 2/63 × 2 = 168/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
9/42 = 9 × 3/42 × 3 = 27/126 - Add the two like fractions:
168/126 + 27/126 = 168 + 27/126 = 195/126 - 195/126 simplified gives 65/42
- So, 84/63 + 9/42 = 65/42
In mixed form: 123/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63+18/42 84/63+9/84 84/63+27/42 84/63+45/42 84/63+63/42