Question

a school want to take a survey on favorite video games. they set up a poll on twitter for students who want to participate. this was the results of their 600 responses:

favorit	video game	percent
fifa	25%
none	____%
nba 2k	15%
mario	7%

the percent of the students voted for none is percent
the amount of students who actually voted for nba 2k is people

Explanation:

Step1: Calculate the percentage of students who voted for NONE

The sum of all percentages should be 100%. Let the percentage of students who voted for NONE be $x$. Then $x+43 + 25+15 + 7=100$.
$x=100-(43 + 25+15 + 7)$
$x = 100 - 90$
$x = 10$

Step2: Calculate the number of students who voted for NBA 2k

We know that the total number of responses is 600 and the percentage of students who voted for NBA 2k is 15%. The number of students who voted for NBA 2k is $600\times\frac{15}{100}$.
$600\times\frac{15}{100}=6\times15 = 90$

Answer:

The percent of the students voted for NONE is 10 percent.
The amount of students who actually voted for NBA 2k is 90 people.