Given:
The cost of of the used truck = $3,000
The cost of the new truck = $15,000
So, the difference = 15,000 - 3,000 = 12,000
So, the percent decrease =
[tex]\frac{12000}{15000}\cdot100=\frac{12}{15}\cdot100=0.8\cdot100=80\%[/tex]So, the answer is 80%
