When a number is increased by 50% of itself, the result is 30. What is that number?

Answer:
(B) 20
Step-by-step explanation:
Let the required number be x.
Therefore,
[tex]x + 50\% \: of \: x = 30 \\ \\ x + 0.50 x= 30 \\ \\ 1.5x = 30 \\ \\ x = \frac{30}{1.5} \\ \\ x = \frac{300}{15} \\ \\ x = 20[/tex]