I honestly dont know, the only idea I have is to divide 1800 by 4 to see how much.
You would do $2.00 ÷ 3 = $0.67
10 × $0.67 = $6.70
10 apples would cost $6.70
HOPE THIS HELPED :)
The fraction is 4 1/2. Just convert the decimal into a fraction. 50/100 is the same as 5/10 which is the same as 1/2.