If there are 2 books and 1 is 13 times the other one and the sum is 1904 combined what is the 2nd book

a) 11550

b)35%

Step-by-step explanation:

Hi, to answer this question, first, we have to multiply the stadium capacity by the percentage in decimal form (75/100)

a)15400 x (75/100) = 11,550

For b), we know that 15400 is the 100% of the capacity, so, for 20790 the percentage will be:

15400/100= 20790/x

Solving for x

x= 20790 / 154

x= 135%  

135%-100% = 35%

The percentage increase in the number of seats will be 35%