Add 12/2 and 21/40
1st number: 6 0/2, 2nd number: 21/40
12/2 + 21/40 is 261/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 2 × 20 = 40,
12/2 = 12 × 20/2 × 20 = 240/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
21/40 = 21 × 1/40 × 1 = 21/40 - Add the two like fractions:
240/40 + 21/40 = 240 + 21/40 = 261/40 - So, 12/2 + 21/40 = 261/40
In mixed form: 621/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/2+21/40 12/2+42/40 12/4+21/40 12/2+21/80 36/2+21/40 12/2+63/40 12/6+21/40 60/2+21/40 12/10+21/40 84/2+21/40 12/14+21/40