The percentage profit is approximately 76.875%.
Let's break down the problem step by step:
Initial quantity bought: 150 kg
First sale: Sold 1/2 of 150 kg = 75 kg at $1.5/kg
Remaining quantity: 150 kg - 75 kg = 75 kg
Sale of 1/5 of remaining quantity: 1/5 * 75 kg = 15 kg at $1.6/kg
Balance remaining: 75 kg - 15 kg = 60 kg
Let's calculate the total earnings from these sales:
For the first 75 kg: $1.5/kg * 75 kg = $112.5
For the next 15 kg: $1.6/kg * 15 kg = $24
For the remaining 60 kg: Selling price = 1.8 * buying price = 1.8 * 160 = $288
Now, let's calculate the total earnings: $112.5 + $24 + $288 = $424.5
The total cost price was $160 * 150 kg = $240
Profit = Total earnings - Total cost price = $424.5 - $240 = $184.5
To find the percentage profit, use the formula:
Percentage profit=
×100
Percentage profit= ×100
Percentage profit=
×100≈76.875%
Therefore, the percentage profit is approximately 76.875%.