Add 54/42 and 7/4
1st number: 1 12/42, 2nd number: 1 3/4
54/42 + 7/4 is 85/28.
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,
54/42 = 54 × 2/42 × 2 = 108/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
7/4 = 7 × 21/4 × 21 = 147/84 - Add the two like fractions:
108/84 + 147/84 = 108 + 147/84 = 255/84 - 255/84 simplified gives 85/28
- So, 54/42 + 7/4 = 85/28
In mixed form: 31/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42+14/4 54/84+7/4 54/42+7/8 54/42+21/4 54/42+7/12 54/42+35/4 54/42+7/20 54/42+49/4 54/42+7/28