中一百份數2(英文)

Question

2) One day Mr Chanstocked 200packets of cheese biscuits at $6 each. HE put the biscuits in bags of four packets and sold each bag at $29.4
(2a) Find the profit per cent if Mr Chan sold all the biscuits on that day?
(2b)if MR Chan could sell only 20 bags of biscuits on that day and he sold the remainind bags of biscults the next day at a price of $23.2 each, find his profit or loss per cent.

Answer 1

2a)
Profit of each bags of 4 packets = 29.4 - 4x6 = 5.4

He has 200 / 4 = 50 bags

total profit = 5.4 x 50 = 270

principal = 200 x 6 = 1200

Profit % = 270 /1200 = 22.5%

2b)
Profit on first day = 20 x 5.4 = 108

Loss on first day = ( 50 - 20 ) x (23.2 - 24) = 30 x (-0.8)
= -24

Total Profit = 108 - 24 = 84

Profit % = 84 / 1200 = 7%

Answer 2

a) 200*29.4/4-6*200
=270
the profit is $270
b) (29.4*20+23.2*30)-6*200
-------------------------------------- * 100%
6*200
=7%
the profit is 7%

2006-11-20 18:47:13 補充：
sorrya) 200*29/4-6*200 --------------------------*100% 6*200=22.5%

Answer 3

200 x 5 = 1200

200/4 x 29.4 = 1470

Profit = (1470 - 1200)/1200 x 100
= 270/1200 x 100
= 22.5%

20 x 29.4 = 588

(50-20) x 23.2 = 696

Total of sale = 588 + 696
= 1284

Profit = (1284 - 1200)/1200 x 100
= 84/1200 x 100
= 7%