Try the other shift key. If the key works in other contexts, then it means the function key is not programmed in that application to work with Shift.
The percentage key is above the number 5. Press "Shift + 5" to use it.
hold shift and use the top numbers above the letters.
Hold Shift and press the 2 button on the set of numbers above the letters.
no, numbers can't be case sensitive because if you hold shift while you type a number, you will get the character above the number and not the number.
Broken
There is only one way to fix a laptop that has a shift button that does not work. You will have to take it to a computer shop and have it looked at.
Special characters are found by holding down the shift key above the numbers.
Near Shift.
Shift 8
put your finger on the button an push
press shift then the number 8. *
Shift + 2