Given:
a.) The price of an item has dropped to $63 today.
b.) Yesterday it was $140.
For us to be able to determine the percentage decrease, we will be using the following formula:
[tex]\text{ Percentage Decrease = }\frac{\text{ Original Price - Present Price}}{\text{ Original Price}}\text{ x 100}[/tex]We get,
Original Price = $140
Present Price = $63
[tex]\text{ Percentage Decrease = }\frac{\text{ Original Price - Present Price}}{\text{ Original Price}}\text{ x 100}[/tex][tex]\text{ = }\frac{\text{ 140 - 63}}{\text{ 140}}\text{ X 100}[/tex][tex]\text{ = }\frac{77}{140}\text{ X 100}[/tex][tex]\text{ = }0.55\text{ x 100}[/tex][tex]\text{Percentage Decrease = }55\text{\%}[/tex]Therefore, the decrease of the price in percentage is 55%.