Based on the information given the percentage raise is 20%.
Percentage raise
Using this formula
Percentage raise=Old salary -New salary/Old salary
Where:
Old salary=$375
New salary=$450
Let plug in the formula
Percentage raise= $450 - $375/$375
Percentage raise= $75/$375
Percentage raise=0.2 or 20%
Inconclusion the percentage raise is 20%.
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