Add 80/42 and 45/54
1st number: 1 38/42, 2nd number: 45/54
80/42 + 45/54 is 115/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
80/42 = 80 × 9/42 × 9 = 720/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
45/54 = 45 × 7/54 × 7 = 315/378 - Add the two like fractions:
720/378 + 315/378 = 720 + 315/378 = 1035/378 - 1035/378 simplified gives 115/42
- So, 80/42 + 45/54 = 115/42
In mixed form: 231/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+90/54 80/84+45/54