Add 21/3 and 20/25
1st number: 7 0/3, 2nd number: 20/25
21/3 + 20/25 is 39/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 25 is 75
Next, find the equivalent fraction of both fractional numbers with denominator 75 - For the 1st fraction, since 3 × 25 = 75,
21/3 = 21 × 25/3 × 25 = 525/75 - Likewise, for the 2nd fraction, since 25 × 3 = 75,
20/25 = 20 × 3/25 × 3 = 60/75 - Add the two like fractions:
525/75 + 60/75 = 525 + 60/75 = 585/75 - 585/75 simplified gives 39/5
- So, 21/3 + 20/25 = 39/5
In mixed form: 74/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3+20/25 21/3+40/25 21/6+20/25 21/3+20/50 63/3+20/25 21/3+60/25 21/9+20/25 21/3+20/75 21/15+20/25