Good afternoon my good people of nairaland. May God bless you as you help me with solution/ answer to this question below:

(1) The cost price of 50 mangoes is equal to the selling price of 40 mangoes. What is the percentage profit

(2) In December 12th 2007, Mohammed bought 300 units of Afrococo Corporation shares @ $55 per share. On Dec 10th 2008, Mohammed sold all his shares for $60 per share. What is Mohammed’s percentage realised gain?

1. Let the cost price for one mango be x and the selling price for one mango be y
cost price = 50x
Selling price = 50y
Profit = selling price - cost price
Profit = 50y - 50x
But the cost price of 50 mangoes equals the selling price of 40 mangoes hence 50x = 40y
Therefore profit = 50y -40y = 10y
Percentage profit = (gain/cost price) * 100
= (10y/40y) * 100 = 25%


2. Total value of shares at cost price = $55 * 300 = $16,500
Total value of shares at selling price = $60* 300 = $18,000
Realised gain = $18,000 - $16,500 = $1,500
Percentage realised gain =($1,500/$16,500)*100
= 9.09%