The percent increase is 48.28
Step-by-step explanation:
Given,
Purchase price of used-droid = $2900
Selling price of used=droid = $4300
Profit = Selling price - purchase price
Profit = 4300-2900 = $1400
Percent increase = 

Rounding off to nearest hundredth;
Percent increase = 48.28%
The percent increase is 48.28
Keywords: percentage, subtraction
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Answers: 1.) 37 & 2.) 1 2/3
It will just be -7/12 because anything times 1 stays the same
2
350
x 40
____
000
1400
____
1,400