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KonstantinChe [14]
2 years ago
10

At the grocery store last week, small boxes of facial tissue were on sale at 4 boxes for $5. This week they mark a new price at

5 boxes for $4. What is the percent decrease in the price per box this week?
Mathematics
1 answer:
Anastaziya [24]2 years ago
7 0

Answer: 36%

Step-by-step explanation:

Since the price last week, was 4 boxes for $5. Therefore, the price per box will be:

= $5/4

= $1.25 per box

This week they mark a new price at 5 boxes for $4. The price per box will be:

= $4/5

= $0.8 per box

The percent decrease in the price per box this week will be:

= (1.25 - 0.80)/1.25 × 100

= 0.45/1.25 × 100

= 36%

The Percentage decrease is 36%

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(3m-4/5)2  

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 ——————————

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Step by step solution :

Step  1  :

           4

Simplify   —

           5

Equation at the end of step  1  :

        4

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Step  2  :

Rewriting the whole as an Equivalent Fraction :

2.1   Subtracting a fraction from a whole

Rewrite the whole as a fraction using  5  as the denominator :

          3m     3m • 5

    3m =  ——  =  ——————

          1        5    

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

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Adding fractions that have a common denominator :

2.2       Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

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Equation at the end of step  2  :

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(—————————)2

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Step  3  :

Final result :

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 ———

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Step-by-step explanation:

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