determinar a porcentagem de :
a-22,5% de 500
b-35, 5% de 800
c-75% de 900
c-92,5% de 800
d-31% de 620
e-42,3% de 1200
f-61% de 400
e-4,5% de 800
Respostas
Olá
a) 22,5% de 500
100%-----500
22,5%----x
100x = 22,5.500
100x = 11250
x = 11250/100
x = 112,5
b) 35,5% de 800
100%-----------800
35,5%---------x
100.x = 35,5.800
100x =28400
x = 28400/100
x = 284
c) 75% de 900
100%----------900
75%-------------x
100.x = 75.900
100x = 67500
x = 67500/100
x = 675
d) 92,5% de 800
100%-----------800
92,5%----------x
100.x = 92,5.800
100x = 74000
x = 74000/100
x = 740
e) 31% de 620
100%------------620
31%--------------x
100.x = 31.620
100x = 19220
x = 19220/100
x = 192,2
f) 42,3% de 1200
100%------------1200
42,3%-----------x
100.x = 42,3.1200
100x = 50760
x = 50760/100
x = 507,6
g) 61% de 400
100%-------------400
61%---------------x
100.x = 61.400
100x = 24400
x = 24400/100
x = 244
h) 4,5% de 800
100%--------------800
4,5%---------------x
100.x = 4,5.800
100x = 3600
x = 3600/100
x = 36
Espero ter ajudado.
a = 112,5
b = 284
c = 675
c2 = 740
d = 192,2
e = 507,6
f = 124
g = 36