Add 25/2 and 20/21
1st number: 12 1/2, 2nd number: 20/21
25/2 + 20/21 is 565/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
25/2 = 25 × 21/2 × 21 = 525/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
20/21 = 20 × 2/21 × 2 = 40/42 - Add the two like fractions:
525/42 + 40/42 = 525 + 40/42 = 565/42 - So, 25/2 + 20/21 = 565/42
In mixed form: 1319/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/2+20/21 25/2+40/21 25/4+20/21 25/2+20/42 75/2+20/21 25/2+60/21 25/6+20/21 25/2+20/63 25/10+20/21 25/14+20/21