化為百分數

1. 36是900百分之幾?
36 / 900 × 100％
= 36 / 900 × 100％ （900 , 100 = 約數 900 = 9 100 = 1 ）
= 36 / 9 × 1％（36÷9）
= 4％

2. 900的36%是多少?
900 × 36％
= 900 × 36 / 100 （900 , 100 = 約數 900 = 9 100 = 1 ）
= 9 × 36
= 324

3. X的36%是900,求X的值。
X × 36 ％ = 900
36X = 900
X = 900 ÷ 36
= 900 ÷ 0.36
= 2500

2009-01-28 20:46:51 補充：
4 . 0.125化為百分數 ?
0.125 × 100％
= 0.125

1: 4% (36/900*100%)
2: 324 (900*0.36) / (900*36%)
3: X*36%=900
X=900/36%
X=900*100/36
X=2500
解算
2500*36%=900
4: 12.5% (0.125的小數點向後走兩個位,記得在最後加上%)

1) (36/900)×100%
=4/100×100%
=4%

2) 900×36%
=900×36/100
=324

3) 36x/100=900
36x=90000
x=2500

4) 0.125×100%
=12.5%

36是900的:
36/900*100%
=0.04*100%
=4%
900的36%是:
900*36%
=900*0.36
=324
X的值:
X*0.36=900
X=900/0.36
x=2500
0.125的百分數是:
0.125*100%
=12.5%

1. 4% 2. 324 3. 2500 4.12.5% 唔知係唔係!

2009-01-28 20:38:06 補充：
應該係
1)4%
2)324
3)2500
4)12.5%

2009-01-28 22:11:51 補充：
4)0.125%


sorry!

1) 32400/900=36
2) 900X36%=324
3) 36%X=900
X=2500
4) 25/200=0.125