Manish opened a cafe with an initial investment of Rs. 64000. In the first year he incurred the loss of 10%. During second year he gained the profit of 4% and in the third year he gained the profit of 15%. Calculate his net profit gained in the entire three years.

MCQs on ratios and percentages, finding discounts and percentage, percentage estimations, profit and loss, sales tax or value added tax, compound interest, compound interest rates annually and compound interest formula applications.