Smitty bought a new car for $25,000. He then sold it to a friend for $20,000. What was the percent decrease in the price of the car?

it decreased by 20%

Step-by-step explanation:

In first Lucy's week, her profits were $50, in second week her profits increased by 10% and became $55 (10% from $50 is $5), in third week her profits increased by 10% from $55 and became $60.5 (10% from $55 is $5.5) and in fourth week her profits increased by 10% from $60.5 and became $66.55 (10% from $60.5 is $6.05).
In all over four weeks she will make $50+$55+$60.5+$66.55=$232.05