205,769,205,796 + 1,784,521,794
2 answers:
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Answer:
<em>The cost of a gallon of milk changed 31%</em>
Step-by-step explanation:
<u>Percent Change</u>
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:
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:
Pc = 31%
The cost of a gallon of milk changed 31%
So we'll assume the number is x.
So,
15+= 9.
Now, we solve for x:
= 9-15
= -6
x = -6*2
x = -12
Check work:
15+= 9
15+(-6) = 9
15-6 = 9
9 = 9