Cheese sticks that were previously priced at 5 for $1 are now 4 for $1 find each percent of change and show your work

And employee salary increased by $4500 which represents a 15% raise what is the rate of the increase

Can someone answer this question? : )

Consider the input and output values for f(x) = 2x - 3 and g(x) = 2x + 7. what is a reasonable explanation for different rules with different input values producing the same sequence?