I want to know if someone have the formula to count every 10. Because I already have the formula to remove 1 it's :
var mango = 20
var a = mango / 10
var result = mango - a
mango = 6
You need only the integer part of the calculation, because the rule says every 10 just one.
var mango = 25, a = Math.floor(mango / 10), // get only the integer part of calculation result = mango - a; console.log(result);