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Blake goes from averaging 8 hours of sleep on a school night to averaging 6.5 hours of sleep on the weekend. What is the percent change in the average hours of his sleep?

A. 36
B. 70
C. \(\frac{1}{462}\)
D. \(6(4X + 3Y - 2)\)
E. 18.75
F. 23.36
G. 2.54
H. 36.3
I. \(6(4X - 3Y + 2)\)

**Note:** To calculate the percent change, use the formula:
\[ \text{Percent Change} = \left( \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \right) \times 100 \]

Please show your work to arrive at the answer.

Answer :

Answer:

Step-by-step explanation:

So Blakes sleep 8 hours per night during the school day

8 hours/night...................................100%

6.5 hours/night...................................?

6.5*100/8=81.25

the change in percentage is 100-81.25=18.75%

the percentage change is 18.75

if it is easier for you, another method is:

8-6.5=1.5 subtract the original amount to the new amount

1.5/8=0.1875 divide by the original amount

0.1875*100=18.75 find the percentage

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