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Of all the species in the world, 4 out of 5 species are insects. What percentage of species are insects?

Of all the species in the world, $4$ out of $5$ species are insects. What percentage of species are insects?

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Percents of numbers: word problems

Full solution

Q. Of all the species in the world,

4

out of

5

species are insects. What percentage of species are insects?

Understand ratio given: Understand the ratio given. $\newline$ The problem states that $4$ out of every $5$ species are insects. This ratio can be used to find the percentage.
Convert ratio to fraction: Convert the ratio to a fraction. $\newline$ The ratio $4$ out of $5$ can be written as the fraction $\frac{4}{5}$ .
Convert fraction to percentage: Convert the fraction to a percentage. $\newline$ To convert a fraction to a percentage, multiply it by $100$ . $\newline$ Percentage of species that are insects = $(\frac{4}{5}) \times 100$
Perform calculation: Perform the calculation. $\newline$ Percentage of species that are insects = $(\frac{4}{5}) \times 100 = 0.8 \times 100 = 80\%$

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