Add 12/40 and 21/4
1st number: 12/40, 2nd number: 5 1/4
12/40 + 21/4 is 111/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 4 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
12/40 = 12 × 1/40 × 1 = 12/40 - Likewise, for the 2nd fraction, since 4 × 10 = 40,
21/4 = 21 × 10/4 × 10 = 210/40 - Add the two like fractions:
12/40 + 210/40 = 12 + 210/40 = 222/40 - 222/40 simplified gives 111/20
- So, 12/40 + 21/4 = 111/20
In mixed form: 511/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/40+21/4 12/40+42/4 12/80+21/4 12/40+21/8 36/40+21/4 12/40+63/4 12/40+21/12 60/40+21/4 12/40+21/20 84/40+21/4 12/40+21/28