Percentage Profit/Loss/Discount (Junior Cert Mathematics): Flashcards

Money made vs cost, as % of cost price

$\text{Profit} = \text{Selling Price} - \text{Cost Price}$

$\frac{\text{Profit}}{\text{Cost Price}} \times 100$

Money lost selling below cost, as % of cost price

$\text{Loss} = \text{Cost Price} - \text{Selling Price}$

$\frac{\text{Loss}}{\text{Cost Price}} \times 100$

Reduction in price, as % of original price

$\text{Discount} = \text{Original Price} - \text{Sale Price}$

$\frac{\text{Discount}}{\text{Original Price}} \times 100$

Selling price higher than cost price

Selling price lower than cost price

Cost price

Original price

Always divide by original or cost price