Question

Roy had some pens. 20% of them are red and the rest are black. He sold half of his red pens and 20% of his black pens. What percentage of his pens was sold?

Note: If your answer is 50% then write only 50.

Answer 1

↑ Here is your answer ↓
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Lets suppose that Roy had '100' pens in total.

20% were red, so he had 20 red pens.

Remaining 80% were black so he had 80 black pens.

He sold half of his red pens,

$20/2 = 10$

He sold 20% of his black pens,

$20/100 * 80 = 16$

So, he totally sold

$16 + 10 = 26$

Time to find the percentage!

$26/100 * 100 = 26%$

=> 26