Add 5/42 and 81/4
1st number: 5/42, 2nd number: 20 1/4
5/42 + 81/4 is 1711/84.
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,
5/42 = 5 × 2/42 × 2 = 10/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
81/4 = 81 × 21/4 × 21 = 1701/84 - Add the two like fractions:
10/84 + 1701/84 = 10 + 1701/84 = 1711/84 - So, 5/42 + 81/4 = 1711/84
In mixed form: 2031/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/42+81/4 5/84+81/4 5/42+81/8 15/42+81/4 5/42+81/12 25/42+81/4 5/42+81/20 35/42+81/4 5/42+81/28