Calcule quanto por cento corresponde:
A) 8 de 40
B) 12 de 50
C) 5 de 74
D) 16 de 20
E) 24 de 240
F) 125 de 558
G) 36 de 244
H) 182 de 420
Me ajudem por favor
Soluções para a tarefa
Resposta:
Explicação passo-a-passo:
A) 8 de 40
8=> x
40 => 100
8/40 (:8)/(:8) = x/100
1/5 = x/100
100 = 5x (:5)
20= x
x = 20%
R.: 20%
___________
B) 12 de 50
12 = x
50 = 100
12/50 = x/100
12/1 = x/2
12.2 = x
x = 24%
R.: 24%
________
C) 5 de 74
5 => x
74 => 100
5/74 = x/100
5/37 = x/50
5.50 = 37.x
250= 37x
37x = 250
x = 250/37
x = 6,76%
R.: 6,76%
_____________
D) 16 de 20
16=> x
20 => 100
16/20 (:4)/(:4) = x/100
4/5 = x/100
4/1 = x/20
4.20=x
x = 80%
R.: 80%
___________
E) 24 de 240
240 = 100
24 = x
240/24 = 100/x
10 = 100/x
10x = 100
x = 10%
R.: 10%
____________
F) 125 de 558
558 = 100
125 = x
558/125 = 100/x
558.x = 125.100 (:2)
279.x = 125.50
279x = 6250
x = 6250/279
x = 22,4%
R : 22,4%
____________
G) 36 de 244
36 = x
244 = 100
36/244 (:4)/(:4) = x/100
9/61 = x/100
9.100 = 61x
900 = 61x
61x = 900
x = 900/61
x = 14,75%
R.: 14,75%
______________
H) 182 de 420
420 => 100
182 => x
420/182 = 100/x
42/182 = 10/x
21/182 = 5/x
21x = 182.5
21x = 910
x = 910/21
x = 43,33%
R.: 43,33%