Add 72/21 and 16/54
1st number: 3 9/21, 2nd number: 16/54
72/21 + 16/54 is 704/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
72/21 = 72 × 18/21 × 18 = 1296/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
16/54 = 16 × 7/54 × 7 = 112/378 - Add the two like fractions:
1296/378 + 112/378 = 1296 + 112/378 = 1408/378 - 1408/378 simplified gives 704/189
- So, 72/21 + 16/54 = 704/189
In mixed form: 3137/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21+32/54 72/42+16/54 72/21+48/54 72/63+16/54 72/21+80/54