A full-time employee’s hourly wage was increased by 10%. He decided to decrease the number of hours worked per week so that his total income did not change. By approximately what percent should the number of hours worked be decreased?
Pick
A) 7%	B) 9%	C) 25%	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 10% wage increase, the employee makes $1.10/hour   We want the employee's income to remain at $100/week.   So, we want ($1.10/hour)(new # of hours) = $100   Divide both sides by 1.10 to get:   new # of hours = 100/1.10   ≈ 90 hours   So, the number of hours decreases from 100 hours to (approximately) 90 hours.   This represents a 10% decrease (approximately) .   Answer choice 9% is the closest answer.
<result>B</result>
A full-time employee’s hourly wage was increased by 10%. He decided to decrease the number of hours worked per week so that his total income did not change. By approximately what percent should the number of hours worked be decreased?