Add 72/63 and 84/18
1st number: 1 9/63, 2nd number: 4 12/18
72/63 + 84/18 is 122/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
72/63 = 72 × 2/63 × 2 = 144/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
84/18 = 84 × 7/18 × 7 = 588/126 - Add the two like fractions:
144/126 + 588/126 = 144 + 588/126 = 732/126 - 732/126 simplified gives 122/21
- So, 72/63 + 84/18 = 122/21
In mixed form: 517/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/63+84/36 72/63+84/54 72/63+84/90