A part-time employee’s hourly wage was increased by 40%. She decided to decrease the number of hours worked per week so that her total income did not change. By approximately what percent should the number of hours worked be decreased? Choose the correct choice from the following:
A) 9%
B) 15%
C) 29%
D) 50%
E) 100%
Let's plug in somenicenumbers and see what's needed.   Let's say the employee used to make $1/hour and worked 100 hours/week   So, the TOTAL weekly income was $100/week   After the 40% wage increase, the employee makes $1.40/hour   We want the employee's income to remain at $100/week.   So, we want ($1.40/hour)(new # of hours) = $100   Divide both sides by 1.40 to get:   new # of hours = 100/1.40   ≈ 71 hours   So, the number of hours decreases from 100 hours to (approximately) 71 hours.   This represents a 29% decrease (approximately) .   Answer : 29%
<result>C</result>
A part-time employee’s hourly wage was increased by 40%. She decided to decrease the number of hours worked per week so that her total income did not change. By approximately what percent should the number of hours worked be decreased?