Question

What is 20% of 800 for problem 4 part 2

Answer 1

The correct answer is 160

Answer 2

160 is 20% of 800

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\%=(p)/(100)\\\\20\%=(20)/(100)=(2)/(10)=0.2\\\\20\%\ of\ 800\to0.2\cdot800=160`