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90____ ?
?=90x100/180=9000/180 ------> 50%
b) 160______100%
40______?
?=40x100/160= 4000/160 --------> 40%
c) 140________100%
14________?
?=14x100/140=1400/140------> 10%
d) 83________100%
8,3________ ?
?=8.3x100/83= 830/83---------> 10%
e) 25________100%
5________?
?=5x100/25= 500/25-------> 20%
f) 400________100%
300_________?
?=300x100/400=30000/400---------->75%
6.62-
12%---------42,6
100%--------?
?=42,6x100/12=4260/12_______ respuesta es 355
6.63-
27%________621
100%________?
?=621x100/27=62100/27_______ respuesta es 2300
6.64-
a)15%-------63
100%____?
?=63x100/15=6300/15_______ respuesta es 420
b)17%_____76,5
100%_______?
?=76,5x100/17=7650/17______respuesta es 450
c)80%______40
100%_______?
?=40x100/80=4000/80____________respuesta es 50
d)72%____522
100%_____ ?
?=522x100/72=52200/72______ respuesta es725
180x=9000
x=9000/180
x=50
50%
b) x/100· 160=40
160x=4000
x=4000/160
x=25
25%
c) x/100· 140=14
140x=1400
x=1400/140
x=10
10%
d) x/100· 83=8,3
83x=830
x=10
10%
e) x/100· 25=5
25x=500
x=500/25
x=20
20%
f) x/100·400=300
400x/100=300
4x=300
x=300/4
x=75
75%