Answer: A

The price decreased by $750 - 600 = 150$ dollars. A percent decrease compares the change to the original price, so the decrease is $\frac{150}{750} = 0.2$, or $20\%$.

Choice B divides the decrease by the new price, $\frac{150}{600} = 0.25$, but percent change uses the original value as the base.

Why the other choices are wrong

• B. This divides the 150 dollar decrease by the new price, 600, instead of the original price, 750.
• C. 80% is the new price as a percent of the original price, not the percent decrease.
• D. 125% is 750 divided by 600, which compares the prices the wrong way and isn't a percent decrease.