$x-12\%=100$, find $x$ I need to pay someone after deducting $12\%$ commission. I want to pay him round amount of $10,000$ What is the formula to establish the $112\%$ figure so that once I have deducted my comm I will be left with $10,00$.
I know the answer is not $11200$ because $11200 - 12\% = 9856$.

Please help me with a formula that will calculate $x - 12\%= 10,000$
or $x - 12\% = 7000$  or $x-12\% = 5000$.

Thanks so much,
Maurice
One may observe that, in general,
$$
x - a\%\:x=b
$$ is just
$$
\left(1-\frac{a}{100} \right)\times x=b
$$ giving, if $a \neq 100$,


  $$
x=\frac{b}{\left(1-a/100\right)}
$$
see its quite simple sorry for misinterpreting first time. so here we assume total amount to be $x$ thus you want $12\%$ commision of $x$ and extra $10K$. so our equation becomes $\frac{12x}{100}+10000=x$ thus on solving you get $x=11363.63..$ now i hope i have interpreted your question correctly.