If you take 369 divided by 410 it gives you 0.9 which is equal to 90% which then leads us to realized that if 369 is 90% of 410 then the discount would have to be 10%
We are given the expanded form and we need to write the standard form: 10 + 8x(1/10) + 3 x(1/100) + 9 x (1/1000) So, that is: 10 + 0.8 + 0.03 + 0.009 = 10.839
