Add 1/21 and 20/6
1st number: 1/21, 2nd number: 3 2/6
1/21 + 20/6 is 71/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
1/21 = 1 × 2/21 × 2 = 2/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
20/6 = 20 × 7/6 × 7 = 140/42 - Add the two like fractions:
2/42 + 140/42 = 2 + 140/42 = 142/42 - 142/42 simplified gives 71/21
- So, 1/21 + 20/6 = 71/21
In mixed form: 38/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21+20/6 1/21+40/6 1/42+20/6 1/21+20/12 3/21+20/6 1/21+60/6 1/63+20/6 1/21+20/18 5/21+20/6 1/21+20/30 7/21+20/6 1/21+20/42