Question

the price of a notebook has dropped to $3.50 today yesterday price was $3.75 find the percentage decrease round your answer to the nearest tenth of a percent

Answer 1

We have two prices for a notebook, the price today and yesterday:

`\begin{gathered} P_{\text{today}}=3.5 \\ P_{\text{yesterday}}=3.75 \end{gathered}`

We want to find in what percentage the price today decreased from yesterday price, so we compute:

`\frac{P_{\text{today}}-P_{\text{yesterday}}}{P_{\text{yesterday}}}=(3.5-3.75)/(3.75)=-(1)/(15)\cong-0.06666_{}`

Multiplying by 100% we find in how much percent the price decreased. We find that the price decreased by 6.7% percent.