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:

^{30} / _{100} = ^{Part} / _{27.99}

Cross multiply:

30 x 27.99 = 100 x Part, or

839.7 = 100 x Part

Now, divide by 100 and get the answer:

Part = ^{839.7} / _{100} = 8.397

Use again the same percentage formula:

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

^{%} / _{100} = ^{30} / _{27.99}

Cross multiply:

% x 27.99 = 30 x 100

Divide by 27.99 and get the percentage:

% = ^{30 x 100} / _{27.99} = 107.18113612004%