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:

^{9} / _{100} = ^{Part} / _{42}

Cross multiply:

9 x 42 = 100 x Part, or

378 = 100 x Part

Now, divide by 100 and get the answer:

Part = ^{378} / _{100} = 3.78

Use again the same percentage formula:

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

^{%} / _{100} = ^{9} / _{42}

Cross multiply:

% x 42 = 9 x 100

Divide by 42 and get the percentage:

% = ^{9 x 100} / _{42} = 21.428571428571%