Add 25/21 and 20/5
1st number: 1 4/21, 2nd number: 4 0/5
25/21 + 20/5 is 109/21.
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,
25/21 = 25 × 5/21 × 5 = 125/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
20/5 = 20 × 21/5 × 21 = 420/105 - Add the two like fractions:
125/105 + 420/105 = 125 + 420/105 = 545/105 - 545/105 simplified gives 109/21
- So, 25/21 + 20/5 = 109/21
In mixed form: 54/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21+20/5 25/21+40/5 25/42+20/5 25/21+20/10 75/21+20/5 25/21+60/5 25/63+20/5 25/21+20/15 25/21+20/25 25/21+20/35