Add 7/42 and 5/4
1st number: 7/42, 2nd number: 1 1/4
7/42 + 5/4 is 17/12.
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,
7/42 = 7 × 2/42 × 2 = 14/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
5/4 = 5 × 21/4 × 21 = 105/84 - Add the two like fractions:
14/84 + 105/84 = 14 + 105/84 = 119/84 - 119/84 simplified gives 17/12
- So, 7/42 + 5/4 = 17/12
In mixed form: 15/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42+5/4 7/42+10/4 7/84+5/4 7/42+5/8 21/42+5/4 7/42+15/4 7/42+5/12 35/42+5/4 7/42+25/4 7/42+5/20 49/42+5/4 7/42+35/4 7/42+5/28