Which rate is greater? 18 pages in 36 minutes or 20 pages in 30 minutes. Explain your resoning

The first rate is 18/36 = 0.5 While the second rate is 20/30 = 0.6666666 So the second rate is greater.

The second example is a greater rate of reading.

In order to come to that conclusion, I didn't do any figuring, ciphering,

numerating, or calculating of any kind. I just sat there and looked at

the question. I noticed that the second example is more pages than

the first one, but done in less time than the first one. So I know that

it must be a greater rate of cranking out the pages.