\(\frac{1}{4}=0.25\)
\(0.01\) percent = \(\frac{0.01}{100} = 0.0001\)
Hence we are asked to find \(0.25 * 0.0001\)
\(25 *1 = 25\) now to add the number of zeros after decimal and before 25 count the number of zeros in the two numbers that were multiplied.
i.e \(2\)for \(0.25\)and \(4\) for \(0.0001\) so altogether \(6\)
two places has already been filled by 25 hence we need four zeros after decimal
\(0.000025\)
option A
_________________

This is my response to the question and may be incorrect. Feel free to rectify any mistakes
Need Practice? 20 Free GRE Quant Tests available for free with 20 Kudos

A different approach.

Notice that 1/4 of 0.01% = 0.01% of 1/4 = 0.01% of 0.25

Now look for a pattern....

100% of 0.25 = 0.25
10% of 0.25 = 0.025
1% of 0.25 = 0.0025
0.1% of 0.25 = 0.00025
0.01% of 0.25 = 0.000025

Answer: A

Cheers,
Brent
_________________

Brent Hanneson – Creator of greenlighttestprep.com
If you enjoy my solutions, you'll like my GRE prep course.

Sign up for GRE Question of the Day emails