When a class took a math test, 15% of the class failed, 25% made some mistakes (but fail), and 24 students got perfect scores. how many students were in the class?

Okay so we have to figure out what percentage passed first let’s add all the percentages

25%+15%= 40%

Now subtract that from 100%

100%-40%= 60%

So 60% of the class passed

Now let’s use x to represent the total number of people on the class

x•0.6= 24

Now solve for x

x= 40

There are 40 people in the class we figure this out my converting 60% to 0.6 and multiplying it by 40 and getting 24 which is correct

24 students walk to school