Question

A girl buys a shirt that was originally $45 but is now $15. What is the rate of change?

Answer 1

So first we find the change
45 to 15=45-15=30

change is 30
rate of change=(change)/(original)

original=45
change=30
30/45=10/15=2/3=0.66666666=66%
rate of change is 66.66%