Why does the button doesn't work correctly?

Question

Explanation:
This code is to calculate what mark will you get in an exam (Selectividad) by putting the marks that you are going to have (approximately)
1. Put the marks of each subject and click ENVIA
2. Click CALCULA to calculate the marks

How are calculated?
The first mark is already calculated in the variable "notaBat", with this one I don't have any problem.
The second mark is calculated by multiplying the first mark ("notaBat")*0,6 and adding the average of the 5 first marks you put (the ones below "FASE GENERAL")*0,4
The third mark is calculated by adding the two highest marks you put below "FASE ESPECÍFICA"*0,2

I think that it doesn't work because of a problem with the operations with variables.

Can someone help me??
https://code.sololearn.com/WkFdIbvCKxd3/?ref=app
https://code.sololearn.com/WkFdIbvCKxd3/?ref=app

Answer 1

You need to use parseFloat when you read a number as string and you want to use it in arithmetic operations.

Here is your code with my corrections.

https://code.sololearn.com/WzulM0hI2z04/?ref=app