Add 70/42 and 9/4
1st number: 1 28/42, 2nd number: 2 1/4
70/42 + 9/4 is 47/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
70/42 = 70 × 2/42 × 2 = 140/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
9/4 = 9 × 21/4 × 21 = 189/84 - Add the two like fractions:
140/84 + 189/84 = 140 + 189/84 = 329/84 - 329/84 simplified gives 47/12
- So, 70/42 + 9/4 = 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+18/4 70/84+9/4 70/42+9/8 70/42+27/4 70/42+9/12 70/42+45/4 70/42+9/20 70/42+63/4 70/42+9/28