To calculate the hourly salary after a 50% increase on the base salary of $12 per hour, follow these steps:
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Calculate the amount of the increase: \[ \text{Increase} = \text{Base Salary} \times \text{Increase Rate} \] \[ \text{Increase} = 12 \times 0.50 = 6 \]
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Add the increase to the base salary: \[ \text{New Salary} = \text{Base Salary} + \text{Increase} \] \[ \text{New Salary} = 12 + 6 = 18 \]
Thus, the hourly salary after the increase is $18 per hour.