Question 35447
Lext x be the amount in dollars obtained from sales

the amount earned from plan 1 is 400 + (2/100)*x
the amount earned from plan 2 is 250 + (16/100)*x

The problem is to find out the amount of sales required for both the plans to be equal

which means what is the value of x such that amount from plan1 equals to amount from plan2

400 + (2/100)*x = 250 + (16/100)*x

400 - 250 = (16/100 - 2/100)*x

150 = (14/100)*x
or 
(14/100)*x = 150

x = (150 *100)/14 = (150*50)/7 = 7500/7