15 of the students in a English class passed a English test. If these students are 75% of all the students in the class, how many students are in this English class? Round your answer to the nearest whole number if necessary

Answer:
Part 1) [tex]20\ students[/tex]
Part 2) [tex]95\%[/tex]
Part 3) [tex]9\ games[/tex]
Step-by-step explanation:
Part 1) Using proportion
[tex]\frac{15}{75\%}=\frac{x}{100\%}\\ \\x=15*100/75\\ \\x=20\ students[/tex]
Part 2) Using proportion
[tex]\frac{40}{100\%}=\frac38}{x\%}\\ \\x=100*38/40\\ \\x=95\%[/tex]
Part 3) Using proportion
[tex]\frac{18}{100\%}=\frac{x}{50\%}\\ \\x=18*50/100\\ \\x=9\ games[/tex]