Troy has an album that has 400 hockey cards. Each page of the album holds 4 hockey cards. If 19% of the album is empty, how many pages are filled with hockey cards?

81 pages

Step-by-step explanation:

From the information given :

Total hockey cards = 400

Cards per page = 4

Number of pages = 400 /4

Number of pages in album = 100

% of album which is empty = 19%

% filled = 100 - 19 = 81%

81% of 100

0.81 * 100 = 81 pages

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.

a. is correct