How do you write \[0.8\] as a percent?

Hint: Here we will use the basic concept of the percentage. Firstly we will write the given number in the fraction form. Then we will simply multiply it with 100 to get the value in the percentage form.

Complete step by step solution:
Given number is \[0.8\].
Firstly we will write the given number in the fraction form to avoid the number in terms of decimal form. Therefore, we get
\[ \Rightarrow 0.8 = \dfrac{8}{{10}}\]
We know that to write a number in the form of the percent we have to multiply the given number by 100 to get it in the form of a percentage. Therefore, we get
\[ \Rightarrow 0.8 = \dfrac{8}{{10}} \times 100\% \]
Now we will simply solve this equation to get the given number in terms of the percentage. Therefore, we get
\[ \Rightarrow 0.8 = 80\% \]

Hence, the given number \[0.8\] can be written as 80 percent i.e. \[0.8 = 80\% \].

Note:
While calculating the percentage of something we have to multiply the ratio by 100 to get it in terms of percentage. The percentage of a variable is equal to the ratio of the value of the variable to the total value of the variable and multiplies it with 100 to get the required percentage of the variable. Any value can be written as a percentage. The concept of the percentage widely comes in use for the representation of the larger set of data having very large values like for population increase or used in our educational system or used in banks for interest rates. We should put the % sign after writing the percentage value.