Add 54/42 and 80/9
1st number: 1 12/42, 2nd number: 8 8/9
54/42 + 80/9 is 641/63.
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,
54/42 = 54 × 3/42 × 3 = 162/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
80/9 = 80 × 14/9 × 14 = 1120/126 - Add the two like fractions:
162/126 + 1120/126 = 162 + 1120/126 = 1282/126 - 1282/126 simplified gives 641/63
- So, 54/42 + 80/9 = 641/63
In mixed form: 1011/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84+80/9 54/42+80/18 54/42+80/27 54/42+80/45 54/42+80/63