Add 18/20 and 56/42
1st number: 18/20, 2nd number: 1 14/42
18/20 + 56/42 is 67/30.
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,
18/20 = 18 × 21/20 × 21 = 378/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
56/42 = 56 × 10/42 × 10 = 560/420 - Add the two like fractions:
378/420 + 560/420 = 378 + 560/420 = 938/420 - 938/420 simplified gives 67/30
- So, 18/20 + 56/42 = 67/30
In mixed form: 27/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+56/42 18/40+56/42 18/20+56/84 54/20+56/42 18/60+56/42 90/20+56/42