Add 7/42 and 7/8
7/42 + 7/8 is 25/24.
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,
7/42 = 7 × 4/42 × 4 = 28/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
7/8 = 7 × 21/8 × 21 = 147/168 - Add the two like fractions:
28/168 + 147/168 = 28 + 147/168 = 175/168 - 175/168 simplified gives 25/24
- So, 7/42 + 7/8 = 25/24
In mixed form: 11/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42+7/8 7/42+14/8 7/84+7/8 7/42+7/16 21/42+7/8 7/42+21/8 7/42+7/24 35/42+7/8 7/42+35/8 7/42+7/40 49/42+7/8 7/42+49/8 7/42+7/56