Question

A machine prints 8 banner in 120 seconds. how many seconds does take to print one banner

Answer 1

$\frac{120}{8}\\15$ 15 seconds-per-banner

Answer 2

So 8 banneers per 120 seconds
8 is to 120=8/120 or 120/8
120/8
make bottom number 1
divide
120/8=60/4=30/2=15/1=15

15 seconds is the answer