Add 81/8 and 7/42
1st number: 10 1/8, 2nd number: 7/42
81/8 + 7/42 is 247/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
81/8 = 81 × 21/8 × 21 = 1701/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
7/42 = 7 × 4/42 × 4 = 28/168 - Add the two like fractions:
1701/168 + 28/168 = 1701 + 28/168 = 1729/168 - 1729/168 simplified gives 247/24
- So, 81/8 + 7/42 = 247/24
In mixed form: 107/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/8+14/42 81/16+7/42 81/8+7/84 81/8+21/42 81/24+7/42 81/8+35/42 81/40+7/42 81/8+49/42 81/56+7/42