Suppose the original quantity is $1,500 and the new quantity is $1,650. What should be the first step in solving for the percent increase? What is the percent increase?
a) The first step is to subtract the original quantity from the new quantity; 10%
b) The first step is to divide the increase by the original quantity; 10%
c) The first step is to divide the increase by the new quantity; 9%
d) The first step is to subtract the original quantity from the new quantity; 9%