Add 84/20 and 27/42
1st number: 4 4/20, 2nd number: 27/42
84/20 + 27/42 is 339/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
84/20 = 84 × 21/20 × 21 = 1764/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
27/42 = 27 × 10/42 × 10 = 270/420 - Add the two like fractions:
1764/420 + 270/420 = 1764 + 270/420 = 2034/420 - 2034/420 simplified gives 339/70
- So, 84/20 + 27/42 = 339/70
In mixed form: 459/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+54/42 84/40+27/42 84/20+27/84 84/20+81/42 84/60+27/42