I'm assuming ya want us to simplify 
reemember some exponential rules


so




Let's make this word problem an equation.
x represents price for one pound of cheese.
2.5x=6.5
/2.5 /2.5
x= 2.6
It costs $2.60 for one pound of cheese.
Answer:
The answer is decrease since the number went down.
The percent change should be -12 percent
Answer:
Step-by-step explanation:
it would be 15.12 and you would save5.88