Question

A pearl is formed in 1 of every 10,000 oysters. What percent of oysters make pearls? Hint: An answer of 1, percent would mean 1 of every 100 oysters. Pearls are more rare than that, so the answer will be less than 1 percent. Please choose from one of the following options. 2 percent . 7 percent 0.01, percent or 0.001%

Answer 1

1 out of 1000 pearls = 1:10,000 =

$\frac{1}{10,000} = 0.0001$ = 0.01%  (whenever you make a decimal into a percent, you move the decimal point 2 times)

The answer is 0.01%

Answer 2

It would be 0.001 because if 1 is for 100 oysters, then you would add two zero's in front and move the decimal point over twice, therefore you get 0.001% as your answer.