The fraction of 0.015625 is 1/64 1
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64
You can use an input table x is the input and y is the output.
3(x) (y)7
3(1)=3 (3)7=21
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so on
$850 - if you think about it, 15% off of $100 is just $15 off so add another 0 to the $100 and add another zero to your answer.
Just switch ur x's and y's
(5,1), (6,2) , (7,1), (8,4) <== the inverse
