Answer :
set up a proportion
30 done/100 total = 147 so far/x total
cross multiply
30x = 14700
divide by 30
x = 490
the book is 490 pages long
30 done/100 total = 147 so far/x total
cross multiply
30x = 14700
divide by 30
x = 490
the book is 490 pages long