Add 72/9 and 21/54
1st number: 8 0/9, 2nd number: 21/54
72/9 + 21/54 is 151/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 54 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 9 × 6 = 54,
72/9 = 72 × 6/9 × 6 = 432/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
21/54 = 21 × 1/54 × 1 = 21/54 - Add the two like fractions:
432/54 + 21/54 = 432 + 21/54 = 453/54 - 453/54 simplified gives 151/18
- So, 72/9 + 21/54 = 151/18
In mixed form: 87/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/9+42/54 72/18+21/54 72/9+63/54 72/27+21/54 72/45+21/54 72/63+21/54