Question

Dan read 104 pages of his book. He has 68% of his book left to head. How many pages are in his book?

Answer 1

Those 104 pages constituted (100% - 68%), or 32%, of his book.  Then the # of pages in his book is found as follows:

0.32(# of pages) = 104 pages; # of pages 104 pages    /    0.32  =325 pages.
 

Answer 2

STEP 1:
determine percent of book already read.

= 100% - 68%
= 32% already read


STEP 2:
determine what number 104 is 32% of to find number of pages in book.

x= number of pages in whole book

32% * x= 104
0.32 * x= 104
divide both sides by 0.32

x= 325 pages in whole book


ANSWER: He has 325 pages in his book.

Hope this helps! :)