Multiply the divisor by 10, or 100, or 1000, etc., according to the number of decimal digits, so that it becomes a whole number. Multiply the dividend by the same power of 10.
If you are drawing the operation with a bracket (Division symbol), you would move your decimal as many times to the right in order to make it into a whole number. Then you would move the dividend's decimal to the right as many times that you did to the divisor's decimal. Then do regular division.