Add 72/36 and 21/40
1st number: 2 0/36, 2nd number: 21/40
72/36 + 21/40 is 101/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 36 × 10 = 360,
72/36 = 72 × 10/36 × 10 = 720/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
21/40 = 21 × 9/40 × 9 = 189/360 - Add the two like fractions:
720/360 + 189/360 = 720 + 189/360 = 909/360 - 909/360 simplified gives 101/40
- So, 72/36 + 21/40 = 101/40
In mixed form: 221/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/36+42/40 72/36+21/80 72/36+63/40