Add 72/36 and 21/70
1st number: 2 0/36, 2nd number: 21/70
72/36 + 21/70 is 23/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 70 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 36 × 35 = 1260,
72/36 = 72 × 35/36 × 35 = 2520/1260 - Likewise, for the 2nd fraction, since 70 × 18 = 1260,
21/70 = 21 × 18/70 × 18 = 378/1260 - Add the two like fractions:
2520/1260 + 378/1260 = 2520 + 378/1260 = 2898/1260 - 2898/1260 simplified gives 23/10
- So, 72/36 + 21/70 = 23/10
In mixed form: 23/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/36+42/70 72/36+63/70