Add 1/42 and 15/20
1/42 + 15/20 is 65/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
1/42 = 1 × 10/42 × 10 = 10/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
15/20 = 15 × 21/20 × 21 = 315/420 - Add the two like fractions:
10/420 + 315/420 = 10 + 315/420 = 325/420 - 325/420 simplified gives 65/84
- So, 1/42 + 15/20 = 65/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42+15/20 1/42+30/20 1/84+15/20 1/42+15/40 3/42+15/20 1/42+45/20 1/42+15/60 5/42+15/20 1/42+75/20 7/42+15/20