Add 70/42 and 18/8
1st number: 1 28/42, 2nd number: 2 2/8
70/42 + 18/8 is 47/12.
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,
70/42 = 70 × 4/42 × 4 = 280/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
18/8 = 18 × 21/8 × 21 = 378/168 - Add the two like fractions:
280/168 + 378/168 = 280 + 378/168 = 658/168 - 658/168 simplified gives 47/12
- So, 70/42 + 18/8 = 47/12
In mixed form: 311/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42+36/8 70/84+18/8 70/42+18/16 70/42+54/8 70/42+18/24 70/42+90/8 70/42+18/40 70/42+18/56