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:

^{2.3} / _{100} = ^{Part} / _{21}

Cross multiply:

2.3 x 21 = 100 x Part, or

48.3 = 100 x Part

Now, divide by 100 and get the answer:

Part = ^{48.3} / _{100} = 0.483

Use again the same percentage formula:

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

^{%} / _{100} = ^{2.3} / _{21}

Cross multiply:

% x 21 = 2.3 x 100

Divide by 21 and get the percentage:

% = ^{2.3 x 100} / _{21} = 10.952380952381%