Eighteen students passed the Science Test. If 18 students is 72% of the total number of students in the class, how many students are in the class?

There are 25 students in the class.

Step-by-step explanation:

Let the total number of students in the class= x

No. of students who passed the test = 18 = 72% of x = 72x/100

Therefore, 72x/100=18

=72x=18*100=1800

=x=1800/72= 25 students.

Hence, total number of students in the class= 25 students

3 cups

Step-by-step explanation:

3/4x20=15

2/3x18=12

the ratio of 15 to 12 is 3 because three is their common factor