Add 54/42 and 7/8
1st number: 1 12/42, 2nd number: 7/8
54/42 + 7/8 is 121/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
54/42 = 54 × 4/42 × 4 = 216/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
7/8 = 7 × 21/8 × 21 = 147/168 - Add the two like fractions:
216/168 + 147/168 = 216 + 147/168 = 363/168 - 363/168 simplified gives 121/56
- So, 54/42 + 7/8 = 121/56
In mixed form: 29/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42+14/8 54/84+7/8 54/42+7/16 54/42+21/8 54/42+7/24 54/42+35/8 54/42+7/40 54/42+49/8 54/42+7/56