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:

^{90} / _{100} = ^{Part} / _{30}

Cross multiply:

90 x 30 = 100 x Part, or

2700 = 100 x Part

Now, divide by 100 and get the answer:

Part = ^{2700} / _{100} = 27

Use again the same percentage formula:

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

^{%} / _{100} = ^{90} / _{30}

Cross multiply:

% x 30 = 90 x 100

Divide by 30 and get the percentage:

% = ^{90 x 100} / _{30} = 300%