John had a stock of 1200 books in his bookshop. He sold 75 on Monday, 50 on Tuesday, 64 on Wednesday, 78 on Thursday and 135 on Friday. What percentages of the books were not sold?

Books in inventory= 66.5%

Step-by-step explanation:

First, we determine the number of books sold:

Books sold= 75 + 50 + 64 + 78 + 135= 402 books

Now, using the following formula, the percentage of books in inventory:

Books in inventory= [(books sold/total books) -1]*100

Books in inventory= [1 - (402/1,200)]*100

Books in inventory= 66.5%

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers