Question

Esperando a resposta de vocês!

Answer 1

somamos todos selos primeiramente:
400+200+85+9+306=1000
descubriremos td q queremos  apartir da regra de 3:
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europa
$\frac{1000}{400} \frac{100}{x} =$
1000x=400·100
1000x=40,000
x=$\frac{40,000}{1,000}$
x=40
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asia
$\frac{1000}{200} \frac{100}{x}$
200·100=1000x
20,000=100x
$\frac{20,000}{1000}$=x
x=20
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africa
$\frac{1000}{85} \frac{100}{x}$
85·100=1000x
8,500=1000x
$\frac{8,500}{1000} =x$
x=8,5
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oceania
$\frac{1000}{9} \frac{100}{x}$
9·100=1000x
900=1000x
$\frac{900}{1000} =x$
x=0,9
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america
$\frac{1000}{306} \frac{100}{x}$
306·100=1000x
30,600=1000x
$\frac{30,600}{1000} =x$
x=30,6

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forma de fração
europa=$\frac{40}{100} ou \frac{8}{20}$$ou \frac{4}{10}$
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asia=$\frac{20}{100}$$ou \frac{4}{20} ou \frac{2}{10}$
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africa=$\frac{8,5}{100}$
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oceania=$\frac{0,9}{100}$
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america=$\frac{30,6}{100}$

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forma decimal
europa=0,400
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asia=0,200
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africa=0,085
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oceania=0,009
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america=0,306


espero ter ajudado =)