Before a salary increase, the weekly salary of a worker for 42 hours in a week was as much as the worker is paid now for 35 hours of work in a week. What is the percent increase in the worker's salary per hour?
Choose the correct option: A) 20 B) 22 C) 24 D) 26 E) 28
Let x be the original salary per hour.   Let y be the salary per hour after the increase.   35y=42x   y=(42/35)= 
<gadget id="calculator">(42/35)</gadget>
<output>6/5 = around 1.2</output>
1.2x   The salary increased 20%.   The answer is 20.
<result>A</result>
Before a salary increase, the weekly salary of a worker for 42 hours in a week was as much as the worker is paid now for 35 hours of work in a week. What is the percent increase in the worker's salary per hour?