We have to determine a ratio that is equivalent to 7:4. We already know that 60 students didn’t bring a water bottle. So in order to determine the conversion, we divide 60 by 4 to get 15. Now that we know how to produce the ratio we must determine, we can multiply 15 by 7 as well (number of students who brought a water bottle) and get 105. Now all we have to do is add these up 105+60 is 165 total students:)
