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[Noffsinger]

I need a program for my Casio fx 7000GA that will calculate mark-up percentages over the range of:
0.01 = 100% , 1000 = 10%.
So, if x =0.01 then y = 100 and if x = 1000 then y = 10, what is the value of y when x = 27.55 ?

If anyone knows a progam for my calculator that would do this please let me know.