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7nadin3 [17]
3 years ago
10

Ariel incorrectly says that 2 5/8 is the same as 2.58

Mathematics
2 answers:
Thepotemich [5.8K]3 years ago
8 0

Answer:

ariel is incorrect because 2 5/8 is equal to 2.63

Step-by-step explanation:

lisov135 [29]3 years ago
7 0

Answer:

2 5/8 is a fraction not a decimmal and she is wrong

Step-by-step explanation:

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8.46 If 100 is decreased by a% and the result is decreased by b%, then what is the total percent decrease (in terms of a and b)?
Marysya12 [62]

Answer:

The total percent decrease is $a+b-\frac{a b}{100}$

Step-by-step explanation:

  • We are given with a word problem
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         Step 1: Finding the two percentage decrease

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Step 1 of 2

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$$\begin{aligned}\frac{b}{100} \times(100-a) &=\frac{100 b-a b}{100} \\\frac{100 b}{100}-\frac{a b}{100} &=b-\frac{a b}{100}\end{aligned}$$

Step 2 of 2

The percentage difference between the two percentages is,

$$\begin{aligned}&(100-a)-\left(b-\frac{a b}{100}\right)=100-a-b+\frac{a b}{100} \\&100-a-b+\frac{a b}{100}=100-\left(a+b-\frac{a b}{100}\right)\end{aligned}$$

Since 100 is the total percent $a+b-\frac{a b}{100}$ is the percentage decrease.

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Step-by-step explanation:

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