Add 21/36 and 25/50
21/36 + 25/50 is 13/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 50 is 900
Next, find the equivalent fraction of both fractional numbers with denominator 900 - For the 1st fraction, since 36 × 25 = 900,
21/36 = 21 × 25/36 × 25 = 525/900 - Likewise, for the 2nd fraction, since 50 × 18 = 900,
25/50 = 25 × 18/50 × 18 = 450/900 - Add the two like fractions:
525/900 + 450/900 = 525 + 450/900 = 975/900 - 975/900 simplified gives 13/12
- So, 21/36 + 25/50 = 13/12
In mixed form: 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/36+25/50 21/72+25/50 63/36+25/50 21/36+75/50