Question

When $40$ is substracted from a number, it reduces to its $60\%$. What is $100\%$ of that number?

• A. $100$
• B. $200$
• C. $300$
• D. None of these

Answer 1

The correct option is A $100$

Let the number be $x$.

Then, $x-40=60\%$ of $x$

$\Rightarrow x-40=\frac{60}{100}\times x$

$\Rightarrow 100x-4000=60x$

$\Rightarrow 40x=4000$
$\Rightarrow x=100$
$\therefore 100\%$ of $x=100$.