Add 24/36 and 28/21
1st number: 24/36, 2nd number: 1 7/21
24/36 + 28/21 is 2/1.
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,
24/36 = 24 × 7/36 × 7 = 168/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
28/21 = 28 × 12/21 × 12 = 336/252 - Add the two like fractions:
168/252 + 336/252 = 168 + 336/252 = 504/252 - 504/252 simplified gives 2/1
- So, 24/36 + 28/21 = 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/36+28/21 24/36+56/21 24/72+28/21 24/36+28/42 72/36+28/21 24/36+84/21 24/36+28/63