Add 54/84 and 84/8
1st number: 54/84, 2nd number: 10 4/8
54/84 + 84/8 is 78/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
54/84 = 54 × 2/84 × 2 = 108/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
84/8 = 84 × 21/8 × 21 = 1764/168 - Add the two like fractions:
108/168 + 1764/168 = 108 + 1764/168 = 1872/168 - 1872/168 simplified gives 78/7
- So, 54/84 + 84/8 = 78/7
In mixed form: 111/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84+84/16 54/84+84/24 54/84+84/40 54/84+84/56