Some show degrees. Some show "amount of money." The amount of money will be XXX. XX, with two decimal places. There are no decimals.
All shown are the remaining Numbers in the table.
If you still have the card, it is recommended that you fill the card with money no matter how much is left. Once found out that there is no electricity, the card can be inserted immediately recharge, in case of night power failure there is no place to buy electricity.