Add 18/8 and 40/42
1st number: 2 2/8, 2nd number: 40/42
18/8 + 40/42 is 269/84.
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,
18/8 = 18 × 21/8 × 21 = 378/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
40/42 = 40 × 4/42 × 4 = 160/168 - Add the two like fractions:
378/168 + 160/168 = 378 + 160/168 = 538/168 - 538/168 simplified gives 269/84
- So, 18/8 + 40/42 = 269/84
In mixed form: 317/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+40/42 18/8+80/42 18/16+40/42 18/8+40/84 54/8+40/42 18/24+40/42 90/8+40/42 18/40+40/42 18/56+40/42