3 pieces for each person. 38 left in total. Hope this help!
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75%
30/40 means its 75% out of 100%
75$ representing the 30 and the 100$ representing the 40

Step-by-step explanation:

Let 
Then 
or

This gives us
or all integer multiples of 
Slope = 4 but I need to get to 20 characters to reply to this question. Have a nice day