percentages math question_p.6

2007-07-22 7:49 am
plz hep me to do the questions .Thx!If you do not know the answer,plz answer no!Thx!

1.Find the values of the following:
(a) 6%-3%
(b) 2+20%
(c) 180(1+5%)

回答 (3)

2007-07-22 8:25 am
When you are going to do such %age problem, bear in mind that % itself is a number, equals to 1/100 or 0.01
a) 6% - 3% means 6x0.01 - 3x0.01 = 0.06 - 0.03 = 0.03 = 3 x 0.01 = 3%
got it?
for the following, follow the same procedure: change % to number and then change the number to %. Finish!
2007-07-22 8:01 am
(a)
6%-3%
=3% or 0.03
(b)
2+20%
=220% or 2.2
(c)
180(1+5%)
=180x(1.05)
=18900% or 189
參考: 心算
2007-07-22 7:52 am
a)100
b)110
c)1080
參考: 中學果D計算機...


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