Add 8/42 and 40/8
1st number: 8/42, 2nd number: 5 0/8
8/42 + 40/8 is 109/21.
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,
8/42 = 8 × 4/42 × 4 = 32/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
40/8 = 40 × 21/8 × 21 = 840/168 - Add the two like fractions:
32/168 + 840/168 = 32 + 840/168 = 872/168 - 872/168 simplified gives 109/21
- So, 8/42 + 40/8 = 109/21
In mixed form: 54/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42+40/8 8/42+80/8 8/84+40/8 8/42+40/16 24/42+40/8 8/42+40/24 40/42+40/8 56/42+40/8 8/42+40/56