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<span>paper and pencil to record work</span>
I believe it should be 5.3487 since 283% is converted into 2.83 and multiplied by 1.89.
x-0.1x=36
where x is the original price
0.1x is the discount (10% of the original price)
36 is the price paid
x-0.1x=36
0.9x=36
----- ----
0.9 0.9
x=40
The original price is $40.00
