Could you help me?

Question

Stephen read 90 pages in 6 days. If he continues at this rate, how long will it take him to read 300 pages. Please help.

Answer 1

Set up a ratio:

 

90 pages   =    300 pages

 6 days               x days

 

Cross multiply:

 

90*x = 300*6

 

90x = 1800

Divide by 90:

 

x = 1800/90 = 20 days