Answer:
The cost of a gallon of milk changed 31%
Step-by-step explanation:
Percent Change
Is the difference between two values of the same variable in different times or conditions, expressed as a percentage of the original value.
The formula is:
[tex]\displaystyle Pc=\left |\frac{v1-v2}{v1} \right |\cdot 100\%[/tex]
Where
v1 = original value
v2 = final value
The gallon of milk cost v1=$2.90 in 2002 and v2=$3.80 in 2018. The percent change is:
[tex]\displaystyle Pc=\left |\frac{2.90-3.80}{2.90} \right |\cdot 100\%[/tex]
[tex]\displaystyle Pc=\left |\frac{-0.9}{2.90} \right |\cdot 100\%[/tex]
Pc = 31%
The cost of a gallon of milk changed 31%
