Write 0.4% as a fraction in simplest form.

To find the decimal form of a percentage, you divide by 100. If you have a decimal, then to divide by 100 just move the decimal 2 places to the left.

0.4% =.004

Now to turn it into a fraction, just read the place value ...

four one thousandths = 4/1000

Now reduce ... 4/1000 = 2/500 = 1/250

The simplest form of 0.4% as a fraction is ... 1/250