Add 70/42 and 15/8
1st number: 1 28/42, 2nd number: 1 7/8
70/42 + 15/8 is 85/24.
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,
70/42 = 70 × 4/42 × 4 = 280/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
15/8 = 15 × 21/8 × 21 = 315/168 - Add the two like fractions:
280/168 + 315/168 = 280 + 315/168 = 595/168 - 595/168 simplified gives 85/24
- So, 70/42 + 15/8 = 85/24
In mixed form: 313/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42+30/8 70/84+15/8 70/42+15/16 70/42+45/8 70/42+15/24 70/42+75/8 70/42+15/40 70/42+15/56