Question 6

A rare mineral makes up 1/250 of a rock sample. What percentage of the sample is the mineral?

0.04%
0.4%Correct answer
4%
40%

Explanation

Converting the fraction gives 1 / 250 x 100 = 0.4%, so the percentage is below 1%. The value 0.04% introduces an extra factor of ten, while 4% corresponds to 1 / 25 rather than the stated fraction.

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Question 6: A rare mineral makes up 1/250 of a rock sample. What… · Percentages · Questena