Martin has read 70​% of a book. He has 6 more pages to finish. How many pages are there in the​ book?

Answer 1

the 6 pages that martin is left to read represent (100% - 70%) = 30% of total.

if X is the total number of pages in the book then, 6 pages = ( 30*X /100) = 0.3*X, and X = (6 / 0.3) = 20 pages

Proof:

The the number of pages read = ( 70*X)/100) = 0.7*X = 0.7( 20 pages) = 14 pages

The total number of pages = X = 14 + 6 = 20 pages