Difficult questions in Mathematics -percentage -(15)

(a)Cost of the biscuits = 200 x $6.00 = $1200.00
Total No. of bags = 200/4 = 50bags
Selling price of all biscuits = 50bags x $29.40each = $1470.00
Profit of all biscuits = $1470.00 - $1200.00 = $270.00
The profit per cent = $270.00/$1200.00 x 100% = 22.5%

(b)20bags sold at $29.40each, 30bags sold at $23.20
Selling price of all biscuits = 20bags x $29.40 + 30bags x $23.20
= $588.00 + $696.00
= $1284.00
Profit of all biscuits = $1284.00-$1200.00 = $84.00
The profit per cent = $84.00/$1200.00 x 100% = 7%

mr chan 用以每包$6的價錢買左200包餅
然後每4包餅入落一個袋度, 每袋賣$29.4

a) 如果mr chan 賣晒d 餅, 佢ge profit per cent 係幾多

number of bags of biscuits = 200/4 = 50 bags
profit % = [50(29.4) - 200(6)] /200(6) x100% = 22.5%
therefore the profit per cent is 22.5%

b) 如果mr chan 只係以$29.4 ge價錢賣左20袋餅, 餘下ge 賣$23.2, 佢ge profit or loss percent 係幾多

% = [20(29.4) + 30(23.2) - 200(6)] / 200(6) x 100% = +7%
therefore the profit per cent is 7%

25a. 29.4x(200/4)-200x6
=29.4x50-1200
=1470-1200
=$200

b.{[20x29.4+(50-20)x23.2]-1200} /1200 x100%

={[588+696]-1200} /1200 x100%

=84/1200 x100%

=7%