Astudents cost for last semester was $2100.she spent $420 of that on books. what percent of last semesters college costs was spent on books?

 The required percent of cost that was spent on books is 20%.

Step-by-step explanation:  Given that a student's cost for last semester was $2100 and she spent $420 of that on books.

We are to find the percent of last semester's college costs that was spent on books.

The total cost of last semester, C = $2100

and

the cost of books in the last semester, S = $420.

Therefore, the percent of last semester's college costs that was spent on books is given by

Thus, the required percent of cost that was spent on books is 20%.

2 over 5

step-by-step explanation:

the 2: 3 ratio is the length of the ac segment to the cb segment total length. this implies that the ratio between segment ac length and segment ab length is 2: 5. point c is 2/5 from a to b, so the required fraction is 2/5.

d

step-by-step explanation:

d