超易初中maths,20分送！急快!！！！！！！

Convert the following percentages to fraction,and simplify where necessary 1)125%。2）0.02%
ans: 1)125%=125%/100%=125/100=5/4
2) 0.02%=0.02%/100%=0.02/100=2/10000=1/5000


1)mr chan spends 5000$ on rent which is 62.5%of his salary?
ans: 5000/62.5%=$8000

2)there are 125 animals in a zoo. 12%. of them are monkeys and 8%are deers.how many monkeys and deers totally in zoo?
ans: Moneys:125x12%=15
Deers:125x8%=10
monkeys and deers in total: 15+10=25

3）ken spend 20% of his monthly salary on food，43.5 %on rent,8.5% on clothes,15%on traveling,7%on tax,and save the rest.if he saves $1080per month, what is his monthly salary?
ans: 1080/(1-20%-43.5%-8.5%-15%-7$)=1080/6%=$1800

4)in a ball,there were 8000 female participants ,which were 40%of the total participants.given that there were 25000 seats in the ball
1)find the total number of participants and
2)find the percentage of seats occupied by all participants
ans:1)8000/40%=20000 participants
2)20000/25000=4/5=80%

express the following fractions as percentages
1)24over60. 2)240over720
ans: 1)24/60=0.4=40%
2)240/720=24/72=3/9=1/3=0.333333...=33.33% (correct to 2 decimal places)

if x is 25%of 150,find x
ans: 150x25%=37.5

if 102 is 68%of p,find p
ans: 102/68%=150