The factors is just 1 and 23. The array should be 23 rows/columns of just 1 dot only. Here's an example:
Factors of 5: 1 and 5
Array: •••••
5/100 * 4 = 20/100 reduces to 1/5
Well, all you have to do to solve this is multiply 850 times 10, which is 8,500, so that means there are 8 thousands.
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Answer:
12.5%
Step-by-step explanation:

= 12.5%
Percentage of total cost that is the payments= 12.5%
100/6 = 16.66 rounds to 16.7