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@ 2014-03-06T15:08:46Z

<?php

function getCoefAtAmericanFormat($coef)
    {
        if ($coef == '' || $coef  == 0)
        {
            return 0;
        }

        return $coef == 2 ? "+100" : $coef < 2 ? '-' . round(100 / ($coef - 1)) : '+' . round((($coef - 1) * 100));
    }

echo getCoefAtAmericanFormat(1.04);

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This is an error 404