Add 80/42 and 45/7
1st number: 1 38/42, 2nd number: 6 3/7
80/42 + 45/7 is 25/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
80/42 = 80 × 1/42 × 1 = 80/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
45/7 = 45 × 6/7 × 6 = 270/42 - Add the two like fractions:
80/42 + 270/42 = 80 + 270/42 = 350/42 - 350/42 simplified gives 25/3
- So, 80/42 + 45/7 = 25/3
In mixed form: 81/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+90/7 80/84+45/7 80/42+45/14 80/42+45/21 80/42+45/35 80/42+45/49