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Percentages

Simplify: 4...

Question

Simplify: $45 %$ of $280 - 4.5 %$ of $40$

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Solution

$= \frac{45}{100} \times 280 - \frac{4.5}{100} \times 40$
$= \frac{450}{1000} \times 280 - \frac{45}{1000} \times 40$
$= \frac{45}{1000} (10 \times 280 - 40)$
$= \frac{45}{1000} \times 2760$
$= 124.2$

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Q. Evaluate: 28% of 450 + 45% of 280

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Q. The table shows the salaries of

280

Salary(In thousand)	No. of Persons
$5 - 10$	$49$
$10 - 15$	$133$
$15 - 20$	$63$
$20 - 25$	$15$
$25 - 30$	$6$
$30 - 35$	$7$
$35 - 40$	$4$
$40 - 45$	$2$
$45 - 50$	$1$

Calculate the median salary of the data.

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