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:

^{15} / _{100} = ^{Part} / _{31}

Cross multiply:

15 x 31 = 100 x Part, or

465 = 100 x Part

Now, divide by 100 and get the answer:

Part = ^{465} / _{100} = 4.65

Use again the same percentage formula:

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

^{%} / _{100} = ^{15} / _{31}

Cross multiply:

% x 31 = 15 x 100

Divide by 31 and get the percentage:

% = ^{15 x 100} / _{31} = 48.387096774194%