Question

a investor made a profit of tk 420 plus 30% of the amount originally paid for a stock. If the cost of the stock was originally tk 2800 what persent of the cost was the total profit?

Answer 1

Answer:

The total profit was 30% of the cost.

Step-by-step explanation:

Total Profit = 420 + 0.30(2800)

Total Profit = 840

2800     -   100%

840 .     -      ?

Now, cross multiply after you have arrived at this proportion.  

$\frac{84000}{2800}$ (I have skipped writing 840 x 100 and have directly written 84000.  Remember that this step is there, however.)

Cancel out the zeroes (to solve the problem easily) or divide without cancelling out the zeroes.

$\frac{84000}{2800} = \frac{840}{28}$

840/28 = 30.

Therefore, the total profit was 30% of the cost.