The price of an changed from $120 to$100, then later the prices decrease again from $100 to $80. Which of the change was larger in terms of percent?
I'll get you started. These problems are all about the same.
The percent change is the amount pf the change divided by the starting amount. In this case, the two changes are
(100-120)/120 = -20/120 = -1/6 = -16.67%
(80-100)/100 = -20/100 = -20%