Question

$150 as a percentage of $500

Answer 1

I think the answer is 30 

Because I did 150÷500×100

Answer 2

Method 1

$\begin{array}{cccc}\ 500&-&100\%&|divide\ both\ sides\ by\ 10\\\ 50&-&10\%&|multiply\ both\ sides\ by\ 3\\\ 150&-&30\%\end{array}$

Answer: $150 is 30% of $500

Method 2

$\begin{array}{ccc}\ 500&-&100\%\\\ 150&-&p\%\end{array}\ \ \ |cross\ multiply\\\\500p=150\cdot100\\500p=15000\ \ \ \ |divide\ both\ sides\ by\ 500\\p=30$

Answer: $150 is 30% of $500

Method 3

$\dfrac{\ 150}{\ 500}\cdot100\%=\dfrac{15}{50}\cdot100\%=\dfrac{15}{1}\cdot2\%=15\cdot2\%=30\%$

Answer: $150 is 30% of $500