Question

A dozen of roses cost $15 at pretty petals florist and four more dozen are purchased the cost is 12 per dozen what is the price change in the price of a dozen roses? Does the change to a percent increase or percent decrease in price?

Answer 1

Decrease of 20%

1) Gathering the data:

1 dozen 12 roses ----- $15

4 dozens 48 roses $12/per dozen

2) Note that with the first price, four dozens would cost $60. But since the new price, we have $48 for those 4 dozens. So there was the following decrease:

`\begin{gathered} 60----100\% \\ 48----x \\ 60x=4800 \\ (60x)/(60)=(4800)/(60) \\ x=80\% \\ \\ 100\%-80\%=20\% \end{gathered}`

So as we can see there was a decrease of 20% for the price of 4 dozens.