See the solutions to these problems just after the percentage calculator below.

Here are the solutions to the questions stated above:

Always use this formula to find a percentage:

^{%} / _{100} = ^{Part} / _{Whole} replace the given values:

^{20} / _{100} = ^{Part} / _{500000}

Cross multiply:

20 x 500000 = 100 x Part, or

10000000 = 100 x Part

Now, divide by 100 and get the answer:

Part = ^{10000000} / _{100} = 100000

Use again the same percentage formula:

^{%} / _{100} = ^{Part} / _{Whole} replace the given values:

^{%} / _{100} = ^{20} / _{500000}

Cross multiply:

% x 500000 = 20 x 100

Divide by 500000 and get the percentage:

% = ^{20 x 100} / _{500000} = 0.004%