Add 18/42 and 84/4
1st number: 18/42, 2nd number: 21 0/4
18/42 + 84/4 is 150/7.
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,
18/42 = 18 × 2/42 × 2 = 36/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
84/4 = 84 × 21/4 × 21 = 1764/84 - Add the two like fractions:
36/84 + 1764/84 = 36 + 1764/84 = 1800/84 - 1800/84 simplified gives 150/7
- So, 18/42 + 84/4 = 150/7
In mixed form: 213/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/42+84/4 18/84+84/4 18/42+84/8 54/42+84/4 18/42+84/12 90/42+84/4 18/42+84/20 18/42+84/28