Question

Max can type 160 words in 5 minutes.

Answer 1

400/160=2.5          This is finding the necessary multiplier
2.5*5=x                 I used 2.5 and multiplied it by 5
x=12.5 minutes      This is the answer

It would take 12 minutes and 30 seconds

Answer 2

400/160=2.5
2.5*5=12.5
It would take max12.5 min