Last week, you finished Level 2 of a video game in 32 minutes. Today, you finish Level 2 in 28 minutes. Is the percent of change an increase or a decrease? What is your percent of change?

1) The percent of change is a decrease, as the time needed to complete the level decreased. (28 < 32.)

2) The percent of change can be worked out by doing:

Original time taken (x) - new time (y) = z

(z : x) * 100 = percent of change.

So let's substitute the values in:

32 - 28 = 4

(4 : 32) * 100 = 12.5%.

The answer is 12.5%.