Add 80/42 and 7/4
1st number: 1 38/42, 2nd number: 1 3/4
80/42 + 7/4 is 307/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
80/42 = 80 × 2/42 × 2 = 160/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
7/4 = 7 × 21/4 × 21 = 147/84 - Add the two like fractions:
160/84 + 147/84 = 160 + 147/84 = 307/84 - So, 80/42 + 7/4 = 307/84
In mixed form: 355/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+14/4 80/84+7/4 80/42+7/8 80/42+21/4 80/42+7/12 80/42+35/4 80/42+7/20 80/42+49/4 80/42+7/28