Single-supply DC amplifier circuit with "gain" of 0.66?
Something like this should do you. Note that the input common mode voltage range of the LM358 amplifier only goes to 3V so you can't just buffer a divider with voltage follower (which would be the easiest way, and would typically work around room temperature, but this is engineering so we have to consider worst-case and temperature). 

The output range, with load of more than 2K, goes to within 3.5V so it's fine. 

The input divider has a ratio of 0.50 (and it loads the input with 40K) 

The amplifier has a gain of 1 + 10K/27K 

Total gain is 0.5 (1+10/27) = 0.685, so 4.8V -> 3.28V. 







simulate this circuit &ndash; Schematic created using CircuitLab

Ideally, pick values such that R3||R4 ~= R1||R2 to cancel the effect of input bias current. In the above schematic they are about 30% different.