Add 72/4 and 21/40
1st number: 18 0/4, 2nd number: 21/40
72/4 + 21/40 is 741/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 4 × 10 = 40,
72/4 = 72 × 10/4 × 10 = 720/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
21/40 = 21 × 1/40 × 1 = 21/40 - Add the two like fractions:
720/40 + 21/40 = 720 + 21/40 = 741/40 - So, 72/4 + 21/40 = 741/40
In mixed form: 1821/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/4+42/40 72/8+21/40 72/4+21/80 72/4+63/40 72/12+21/40 72/20+21/40 72/28+21/40