\(\frac{1}{4}=0.25\)
\(0.01\) 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
_________________

10% = 0.1
1% = 0.01
0.1% = 0.001
0.01% = 0.0001

So, 1/4 of 0.01% = 1/4 of 0.0001
= (0.25)(0.0001)
= 0.000025

Answer: A

Cheers,
Brent
_________________

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
_________________

Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.