Tell whether the two ratios form a proportion. Explain. 25/80 and 5/16

1 answer:

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Okay, 25/80 and 5/16.

Divide 25/80 by 5.

25/5 = 5
80/5 = 16

5/16

The other fraction is 5/16, so the ratios are proportional!

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Answer

Find out the percent error in Annie's estimate .

To prove

Formula

$Percentage\ error = \frac{error\times 100}{exact\ value}$

As error = approx value - exact value

As given

Annie estimates that the height of a bookcase is 78.25 in.

The actual height is 75.50 in.

approx value = 78.25 in.

actual value = 75.50 in.

error = 78 .25 - 75 .50

= 2.75

put in the formula

$Percentage\ error = \frac{2.75\times 100}{75.50}$

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Therefore the Percentage error be 3.64 % (approx).

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