Maths for Kids : Profit and loss
Question : Retail Division accounts for 40% of ABC bank’s profit. If the bank wants to grow its overall profit by 15% only through the Retail Division, by how many percentage does this division’s profit have to grow? Solution: let Pi be the bank's initial profit. retail=0.4Pi other=0.6Pi They want to increase their profit by 15% to become Pf=Pi(1.15)=(1+g) retail profit + other profit (1.15)Pi=(1+g)(0.4Pi)+0.6Pi 1.15Pi=(0.4(1+g)+0.6)Pi 1.15=0.4(1+g)+0.6 0.55=0.4(1+g) 1.375=1+g g=0.375=37.5% =========================================== Question : Aishi sold his dinning table set at a loss of 20%. If she had sold it for Rs 600 more, she would have received a profit of 5%. What is the cost price . let X is cost prize Selling prize with 20 % loss = 0.8 X Selling prize with 5 % profit = 1.05 X 1.05 X - 0.8 X = 600 0.25 X = 600 X = 2400 cost prize Rs 2400 ========================================== If the cost price of 12 pencils is equa...