Add 81/2 and 84/4
1st number: 40 1/2, 2nd number: 21 0/4
81/2 + 84/4 is 123/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 4 is 4
Next, find the equivalent fraction of both fractional numbers with denominator 4 - For the 1st fraction, since 2 × 2 = 4,
81/2 = 81 × 2/2 × 2 = 162/4 - Likewise, for the 2nd fraction, since 4 × 1 = 4,
84/4 = 84 × 1/4 × 1 = 84/4 - Add the two like fractions:
162/4 + 84/4 = 162 + 84/4 = 246/4 - 246/4 simplified gives 123/2
- So, 81/2 + 84/4 = 123/2
In mixed form: 611/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/4+84/4 81/2+84/8 81/6+84/4 81/2+84/12 81/10+84/4 81/2+84/20 81/14+84/4 81/2+84/28