The price of a calculator has decreased from $200 to $150. What is the percentage of decrease?
To calculate the percentage of decrease, you first need to find the difference between the initial price and the final price. In this case, the initial price is $200 and the final price is $150.
The decrease in price is $200 - $150 = $50.
To find the percentage decrease, divide the decrease in price by the initial price and then multiply by 100.
Percentage decrease = (decrease / initial price) * 100
In this case, the percentage decrease = ($50 / $200) * 100 = 25%.
Therefore, the percentage of decrease is 25%.