Question

What is 20% of 800 for problem 4 part 2

Answer 1

The correct answer is 160

Answer 2

Answer:

160 is 20% of 800

Step-by-step explanation:

METHOD 1:

$\begin{array}{ccc}100\%&-&800\\\\20\%&-&x\end{array}\qquad\text{cross multiply}\\\\\\100x=(20)(800)\qquad\text{divide both sides by 100}\\x=(20)(8)\\\boxed{x=160}$

METHOD 2:

$\begin{array}{cccc}100\%&-&800&\text{divide both sides by 5}\\\\100\%:5&-&800:5\\\\20\%&-&160\end{array}$

METHOD 3:

$p\%=\dfrac{p}{100}\\\\20\%=\dfrac{20}{100}=\dfrac{2}{10}=0.2\\\\20\%\ of\ 800\to0.2\cdot800=160$