Answer :
If you would like to know how many litres of gas is left in the tank, you can calculate this using the following steps:
used: 4/5 of 60 = 4/5 * 60 = 48 litres
60 - 48 = 12 litres of the gasoline
Result: 12 litres of the gasoline is left in the tank.
used: 4/5 of 60 = 4/5 * 60 = 48 litres
60 - 48 = 12 litres of the gasoline
Result: 12 litres of the gasoline is left in the tank.