39. 4.5 = 450%
(para 1-41)
1
% = 1 = 1 100 = 1 x 1 = 1 = 1:400
40.
4
4 4
1
4 100 400
100
(para 1-50)
41. 1:3 = 1 x 100 = 100 = 33 1%
3
1
3
3
(para 1-47)
42. 1:2000 =
1 x 100 = 100 = 1%
2000 1 2000 20
(para 1-47)
43. 1:2000 = 1 = 1 : 2000 = 0.0005
2000
(para 1-47)
44. 0.002 = 2 = 1 = 1:500
1000 500
(para 1-51)
45. 20% = .20 = 20 = 1 = 1:5
100 5
(para 1-51)
46. 0.75 = 75 = 3 = 3:4
100 4
(para 1-51)
47. 1:4 = 1 = 1 : 4 = 0.25
4
(para 1-47)
48. 47.50:1000 = X:1800
1000X = 85,500
X = .50
(para 1-55)
49. 1:80 = X:200
80X = 200
X = 2 1" or 2.5"
2
(para 1-55)
MD0904
1-54