Add 20/21 and 10/5
1st number: 20/21, 2nd number: 2 0/5
20/21 + 10/5 is 62/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
20/21 = 20 × 5/21 × 5 = 100/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
10/5 = 10 × 21/5 × 21 = 210/105 - Add the two like fractions:
100/105 + 210/105 = 100 + 210/105 = 310/105 - 310/105 simplified gives 62/21
- So, 20/21 + 10/5 = 62/21
In mixed form: 220/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+10/5 20/21+20/5 20/42+10/5 60/21+10/5 20/21+30/5 20/63+10/5 20/21+10/15 20/21+50/5 20/21+10/25 20/21+70/5 20/21+10/35