Add 5/21 and 10/14
5/21 + 10/14 is 20/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
5/21 = 5 × 2/21 × 2 = 10/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
10/14 = 10 × 3/14 × 3 = 30/42 - Add the two like fractions:
10/42 + 30/42 = 10 + 30/42 = 40/42 - 40/42 simplified gives 20/21
- So, 5/21 + 10/14 = 20/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+10/14 5/21+20/14 5/42+10/14 5/21+10/28 15/21+10/14 5/21+30/14 5/63+10/14 5/21+10/42 25/21+10/14 5/21+50/14 5/21+10/70 35/21+10/14 5/21+70/14 5/21+10/98