Percent Proportions

Used to find percent change

• $\frac{new}{original}$ = $\frac{percent}{100}$

• $\frac{change}{original}$ = $\frac{percent}{100}$

• $\frac{original}{new}$ = $\frac{percent}{100}$

• $\frac{change}{new}$ = $\frac{percent}{100}$

Used to find mark up

• $\frac{mark\ up}{wholesale}$ = $\frac{percent}{100}$

• $\frac{mark\ up}{retail}$ = $\frac{percent}{100}$

• $\frac{retail}{wholesale}$ = $\frac{percent}{100}$

• $\frac{mark\ up}{sale\ price}$ = $\frac{percent}{100}$

Used to find discount

• $\frac{discount}{wholesale}$ = $\frac{percent}{100}$

• $\frac{discount}{retail\ price}$ = $\frac{percent}{100}$

• $\frac{discount}{sale\ price}$ = $\frac{percent}{100}$

• $\frac{sale\ price}{discount}$ = $\frac{percent}{100}$

Used to find sales tax

• $\frac{tax}{wholesale}$ = $\frac{percent}{100}$

• $\frac{tax}{discount}$ = $\frac{percent}{100}$

• $\frac{tax}{mark\ up}$ = $\frac{percent}{100}$

• $\frac{tax}{price}$ = $\frac{percent}{100}$

Used to find commission

• $\frac{commission}{price}$ = $\frac{percent}{100}$

• $\frac{commission}{mark\ up}$ = $\frac{percent}{100}$

• $\frac{commission}{mark\ down}$ = $\frac{percent}{100}$

• $\frac{commission}{discount}$ = $\frac{percent}{100}$

Used to find retail price

•  $wholesale\ +\left(\ \frac{mark\ up}{wholesale}\ =\frac{percent}{100}\right)$  

•  $wholesale\ +\left(\frac{mark\ up}{retail}\ =\ \frac{percent}{100}\right)$  

•  $wholesale\ +\ \left(\frac{retail}{wholesale}\ =\ \frac{percent}{100}\right)$ 

•  $wholesale\ +\ \left(\frac{mark\ up}{sale\ price}=\ \frac{percent}{100}\right)$  

Used to find the sale price

•  $retail\ -\ \left(\frac{discount}{wholesale}\ =\ \frac{percent}{100}\right)$  

•  $retail\ -\ \left(\frac{discount}{retail\ price}=\ \frac{percent}{100}\right)$  

•  $retail\ -\ \left(\frac{discount}{sale\ price}=\ \frac{percent}{100}\right)$  

•  $retail\ -\ \left(\frac{sale\ price}{discount}=\ \frac{percent}{100}\right)$  

Used to find grand total of items and tax

•  $price\ +\ \left(\frac{tax}{wholesale}=\ \frac{percent}{100}\right)$  

•  $price\ +\ \left(\frac{tax}{discount}\ =\ \frac{percent}{100}\right)$  

•  $price\ +\ \left(\frac{tax}{mark\ up}\ =\ \frac{percent}{100}\right)$  

•  $price\ +\ \left(\frac{tax}{price}=\ \frac{percent}{100}\right)$