Let be "x" Jon's current salary.
According to the information given in the exercise, the salary at the new job is 68,000 and this is 12% more than his salary at his current job.
To convert from percent to a Decimal number, you can divide by 100. Then:
Therefore, knowing that information, you can set up the following equation:
Now you can solve for "x" in order to find its value:
The answer is: