How To Calculate

Question 1

Part/whole × 100 = __ %
Example: 1/4 × 100 = 25%

Answer 1

How to calculate the percentage

Question 2

Sum of terms/number of terms = average (mean)
Example: 1+2+3/3 = 6/3 = 2

Answer 2

How to calculate the average

Question 3

bacteria × .999 = ____ # killed

Total # - # killed = #alive
Example: 1000 × .999 = 999 killed
1000-999 = 1 alive

Answer 3

How to determine the number of bacteria killed and still alive if 99.9% are killed