Question

2 Exprimați sub formă de fracții ordinare ireductibile:
a)4%;
b) 54%;
c) 80%;
d) 5 1/4%
e)1,7%;
f)2.85%;
g) 4,(2)%;
h) 6,(5)%;
i)2,1(3)%
j)2,10(3)%.​

Answer 1

Răspuns:

a) 4% = 4/100 = 1/25

b) 54% = 54/100 = 27/50

c) 80% = 80/100 = 8/10 = 4/5

d) 5 intreg 1/4% = 21/4  x (1/100) = 21/400

e) 1,7% = 1,7/100 = 17/1000

f) 2,85% = 2,85/100 = 285/10000 = 57/2000

g) 4,(2)% = (42-4)/9 x 1/100 = 38/900 = 19/450

h) 6,(5)% = (65-6)/9 x 1/100 = 59/900

i) 2,1(3)% = 2,1(3)/100 = (213-21)/90 x (1/100) = 192/9000 = 24/1125 = 8/375

j) 2,10(3)% = (2103-210)/900  x (1/100) = 1893/90000 = 631/30000  

Answer 2

Exprimați sub formă de fracții ordinare ireductibile: p%=p/100

a)4%=4/100=1/25

b) 54%=54/100=27/50

c) 80%=80/100=4/5

d) 5 1/4%=21/4%=21/400

e)1,7%=17/10%=17/1000

f)2,85%;=285/100%=285/10000=57/2000

g) 4,(2)%=4 2/9%=38/900=19/450

h) 6,(5)%=6 5/9%=59/900

i)2,1(3)%=2 (13-1)/90%=2 12/90%=2 2/15%=

32/1500=8/375

j)2,10(3)%=2 (103-10)/900%=2 93/900=

1893/90000