Add 12/36 and 75/21
1st number: 12/36, 2nd number: 3 12/21
12/36 + 75/21 is 82/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
12/36 = 12 × 7/36 × 7 = 84/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
75/21 = 75 × 12/21 × 12 = 900/252 - Add the two like fractions:
84/252 + 900/252 = 84 + 900/252 = 984/252 - 984/252 simplified gives 82/21
- So, 12/36 + 75/21 = 82/21
In mixed form: 319/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/36+75/21 12/72+75/21 12/36+75/42 12/36+75/63 60/36+75/21 84/36+75/21