in the town zoo, 3/28 of the animals are birds. of the birds, 4/15 are birds of prey. what fraction of the animals at the zoo are birds of prey?

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17-11-2015
Mathematics

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in the town zoo, 3/28 of the animals are birds. of the birds, 4/15 are birds of prey. what fraction of the animals at the zoo are birds of prey?

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WorldCitizen WorldCitizen · Answer 1 · 2015-11-21T21:02:42+01:00

for this you have to multiply the two numbers :

[tex] \frac{3}{28} [/tex] are birds and out of those [tex]\frac{4}{15} [/tex] are there relevant birds.
Explanation why you have to multiply:
in a similar situation, if you have a number and you want to find out 3/4 of this number: you multiply the original number by 3/4. Here it's just confusing that both numbers are fractions.

[tex]\frac{3}{28} * \frac{4}{15}= \frac{3*4}{28*15} = \frac{3*1}{7*15}= \frac{1*1}{7*5}= \frac{1}{35}[/tex]

so the result is

[tex]\frac{1}{35}[/tex]