At Brown Elementary School, 80% of all fifth graders ride the bus to school. If 124 fifth graders ride the bus to school, how many fifth graders are there at school?

Question

Mathematics

Linda

29 April, 04:07

At Brown Elementary School, 80% of all fifth graders ride the bus to school. If 124 fifth graders ride the bus to school, how many fifth graders are there at school?

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Answers (2)

Know the Answer?

Eddie · Answer 1

Answer:155

Because I had this question before on a test!

Drake Holloway · Answer 2

Answer: 155 fifth grader students.

Step-by-step explanation:

Given that 80% = 124 fifth grader students, the difference between 80% and total number of fifth grader students is 100% - 80%, which is 20%.

Therefore, if 80/100 = 124

(100/100 - 80/100) = x

We cross multiply:

0.8x = 0.2 x 124

0.8x = 24.8

Divide both sides by 0.8

x = 24.8/0.8

x = 31

Total number of fifth grader students is 124 + 31 = 155