I don't understand word problems :/

A copy machine makes 32 copies per minute. How many copies does it make in 5 minutes and 15 seconds?

Question

I don't understand word problems :/ 

A copy machine makes 32 copies per minute. How many copies does it make in 5 minutes and 15 seconds?

texaschic101 · Answer

I am changing the 5 min 15 sec to sec....(5)(60) + 15 = 315 sec
now make a proportion
32/60 = x/315 (32 copies to 60 sec = x copies to 315 sec)
60x = 10080
x = 10080/60
x = 168 copies

anonymous · Answer

yes exactly

anonymous · Answer

Okay . . . . I Kinda Get It But I Kinda Don't. Like I Got The First Two Steps But How Did You Get 10080.? By 60*315.?

texaschic101 · Answer

32/60 = x/315
cross multiply
(60)(x) = (315)(32)
understand now ?

anonymous · Answer

OH.! Okay Now I Understand How You Got That.!

texaschic101 · Answer

good....in proportions, you cross multiply

anonymous · Answer

Okay Well Thank You.! Now I Fully Understood That. My Teacher Taught Us Completely Different And Very Complicated.