Add 20/42 and 2/7
20/42 + 2/7 is 16/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
20/42 = 20 × 1/42 × 1 = 20/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
2/7 = 2 × 6/7 × 6 = 12/42 - Add the two like fractions:
20/42 + 12/42 = 20 + 12/42 = 32/42 - 32/42 simplified gives 16/21
- So, 20/42 + 2/7 = 16/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+2/7 20/42+4/7 20/84+2/7 20/42+2/14 60/42+2/7 20/42+6/7 20/42+2/21 20/42+10/7 20/42+2/35 20/42+14/7 20/42+2/49