Add 84/21 and 5/54
1st number: 4 0/21, 2nd number: 5/54
84/21 + 5/54 is 221/54.
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,
84/21 = 84 × 18/21 × 18 = 1512/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
5/54 = 5 × 7/54 × 7 = 35/378 - Add the two like fractions:
1512/378 + 35/378 = 1512 + 35/378 = 1547/378 - 1547/378 simplified gives 221/54
- So, 84/21 + 5/54 = 221/54
In mixed form: 45/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+10/54 84/42+5/54 84/21+15/54 84/63+5/54 84/21+25/54 84/21+35/54