Add 8/42 and 72/9
1st number: 8/42, 2nd number: 8 0/9
8/42 + 72/9 is 172/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
8/42 = 8 × 3/42 × 3 = 24/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
72/9 = 72 × 14/9 × 14 = 1008/126 - Add the two like fractions:
24/126 + 1008/126 = 24 + 1008/126 = 1032/126 - 1032/126 simplified gives 172/21
- So, 8/42 + 72/9 = 172/21
In mixed form: 84/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42+72/9 8/84+72/9 8/42+72/18 24/42+72/9 8/42+72/27 40/42+72/9 8/42+72/45 56/42+72/9 8/42+72/63