Pankaj expected to earn $425 i n a w e e k . I n f a c t h e e a r n e d$ 500. What was the percentage error?

25 %

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15 %

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11.5 %

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None of these

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Solution

The correct option is C $15 %$
$\Rightarrow$ Here, Approximate value is $$ 425$ .
$\Rightarrow$ Exact value is $$ 500$ .
$\Rightarrow$ $% E r r o r = \frac{| A p p r o x i m a t e v a l u e - E x a c t v a l u e |}{| E x a c t v a l u e |} \times 100$

$\Rightarrow$ $% E r r o r = \frac{| 425 - 500 |}{| 500 |} \times 100$

$\Rightarrow$ $% E r r o r = \frac{| - 75 |}{500} \times 100 = 15 %$

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