F1 Math.

a) y = 75%
b) z = 80
c) $112.50
d) 6000000 and 4000000
e) 21.6%

a) 240=320*y%
so y% =240/320
y=75%

(b) 48=z*60%
z=48/0.6
=80

(c) Let X be the price of the game
X*(1+25%)=150
X=150/1.25
=$120
(d) Ablertcan get money = $10000000*60%
= $6000000
then Ken can get money = $10000000 - $ 6000000
= $4000000

(e) 45%*60%*80% =21.6%

I hope it can help you.

(a) 240 is y% of 320, y=?
240/320 = y%
240/320*100% = y
y = 75%

(b) 48 is 60% of z, z=?
48/60 = z%
48/60*100% = z
z = 80%

(c) $150 = X *(100%+25%)
Let X was the original price!!
$150 = X*125%
$150/125% = X
X = $120

(d) Albert and Ken got 60% and 40% of the money
$10,000,000 * 60% = $10000000 * 0.6
= $6,000,000
$10000000 * 40% = $10000000 * 0.4
= $4,000,000

(e) 45% x 60% x80%
= 45/100 * 60/100 * 80/100
= 216000/1000000 = 216/1000
= 21.6/100
= 21.6 %

(a) 240/320 * 100% = 75%
(b) 48/60% = $80
(c) 150/1.25 = $120
(d) Albert = $6000000, Ken = $4000000
(e) 0.45*0.6*0.8 = 0.216 = 21.6%

其實你可以用計數機計到D答案出黎架啵......
或者搵張算草紙加枝筆，自己計仲好啦
唔好咁懶，淨係諗著上到黎呢到係俾你問功課，咁即使你交到功課，都無用喇
你考試既時候根本就唔識點計，唔通考考下試你走黎呢到發問咩?
無可能架嘛 做人都係靠自己好，咁你先可以學到野呀嘛
(為左你既前途，我係唔會講答案俾你聽架)

2006-12-11 23:37:40 補充：
唉......樓上o個位仁兄就真係害左你喇......好自為之啦......