Add 72/54 and 6/21
1st number: 1 18/54, 2nd number: 6/21
72/54 + 6/21 is 34/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
72/54 = 72 × 7/54 × 7 = 504/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
6/21 = 6 × 18/21 × 18 = 108/378 - Add the two like fractions:
504/378 + 108/378 = 504 + 108/378 = 612/378 - 612/378 simplified gives 34/21
- So, 72/54 + 6/21 = 34/21
In mixed form: 113/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/54+12/21 72/54+6/42 72/54+18/21 72/54+6/63 72/54+30/21 72/54+42/21