I have already seen some answers in stackoverflow related type questions. I could not use "toFixed" function because after multiplying with 100 I need to get back exact value of "a" ("a" means variable). Would you please provide alternative solution to solve this issue. Given bellow added some cases for your better understanding.
//case:01
var a = 19
var b = a/100;
console.log(b) // output: 0.19
console.log(b*100) // output: 19 as expected
//case:02
var a = 7;
var b = a/100;
console.log(b) // output: 0.07
console.log(b*100) // output: 7.000000000000001, expected result:7, that mean not equal to variable "a"
//case:03
var a = 7.7;
var b = a/100;
console.log(b) // output: 0.077
console.log(b*100) // output: 7.7, as expected
//case:04
var a = 7.71;
var b = a/100;
console.log(b) // output: 0.0771
console.log(b*100) // output: 7.71, as expected
Any help would be appreciated. sorry for poor English.