Question

the table shows the number of minutes tim has for lunch and study hall.

period

number of minutes

----

----

lunch

45

study hall

45

he calculates that these two periods account for 18% of the minutes he spends at school. how many minutes does he spend at school?

_______ minutes

Explanation:

Step1: Calculate total time for two periods

$45 + 45 = 90$ minutes

Step2: Set up equation for total school time

Let $x$ = total school minutes. $0.18x = 90$

Step3: Solve for total school time

$x = \frac{90}{0.18}$

Answer:

500 minutes