How many are in kindergarten?

Question

There are 420 students in kindergarten through third grade. If 1/4 of the students are in first grade, 20% are in second grade, and 115 students in third grade, how many students are in kindergarten?

Answer 1

420 total students

1/4 in 1st grade:  420(1/4) = 105

20% in 2nd grade: 420(.20) = 84

115 students in 3rd grade

 

# students in kindergarten = 420 - (105+84+115) = 116 students in kindergarten.