Question

A store gets a bucket of eggs for $16.20 and sells a dozen eggs for $3.50. If there are 450 eggs in the bucket, by what percent has the store increased the price per dozen eggs?

Answer 1

Cost of bucket of eggs = $ 16.20

Number of eggs in the bucket= 450 eggs

Selling price  of Dozen of Eggs= $ 3.50

Cost price of 12 eggs

$=\frac{16.20\times 12}{450}\\\\=0.432$

The Percent by which the store increased the price per dozen eggs

  $\frac{\text{Selling price}-\text{Cost price}}{Cost Price}\times 100\\\\ =\frac{3.50-0.432}{0.432}\times 100\\\\=\frac{3.068}{0.432}\times 100\\\\ 7.1018 \times 100=710.18$

So, the percent by which the store increased the price per dozen eggs=710.18%(Approximately)