如何加总和减去整数

Question

查看整数费率的加法和减法的脚本？帮助

example:
0.50 - 50% = 0.25
35.52 - 47% = ....

Answer 1

将百分比解析为数值：

  0% = 0.0
 50% = 5.0
100% = 1.0
  x% = x/100.0

y +/- x% = y * (1.0 +/- x/100.0)

Answer 2

即使使用此代码也很容易

<?php
function abc($a,$b){
return $a*($b/100);
}

echo 10 - abc(10,50);//number,percent

echo 10 + abc(10,50);//number,percent    

?>

https://eval.in/566981