The wages earned by Robin is 40% more than that earned by Erica. The wages earned by Charles is 60% more than that earned by Erica. How much % is the wages earned by Charles more than that earned by Robin?
Choices.
A) 23%
B) 18.75%
C) 28.57%
D) 50%
E) 100%
Explanatory Answer   Let the wages earned by Erica be $100   Then, wages earned by Robin and Charles will be $140 and $160 respectively.   Charles earns $40 more than Robin who earns $140.   Therefore, Charles' wage is 40/140*100 = 28.57%.   The correct choice is (28.57%)
<result>C</result>
The wages earned by Robin is 40% more than that earned by Erica. The wages earned by Charles is 60% more than that earned by Erica. How much % is the wages earned by Charles more than that earned by Robin?