Based on the information given the rate of increase is 55%.
Rate of increase:
Using this formula
Rate of increase=Stock value per share/Number of shares of stock×100
Where:
Stock value per share=$55 per share
Number of shares of stock=100 shares
Let plug in the formula
Rate of increase=$55/100×100
Rate of increase=55%
Inconclusion the rate of increase is 55%
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