Question

if it takes 20 minutes to run a batch of hundred pills how many minutes will it take to run a batch of 50 pills?

Answer 1

20/100 = x / 50.......20 minutes to 100 pills = x minutes to 50 pills
cross multiply because this is a proportion
(100)(x) = (20)(50)
100x = 1000
x = 1000/100
x = 10 minutes <===

Answer 2

20 minutes for 100 pills

x minutes for 50 pills

set an equation

20/100 = x/50

Cross multiply

20(50) = 100(x)

1000 = 100x

1000/100 = 100x/100

x = 10

10 is your answer

hope this helps