These figures can be much higher because Russia is doing all in its power to lower the numbers. (not that Ukraine isn't trying to lower theirs). I've seen captured Russian soldiers admit that they're hiding losses from the command by borrowing soldiers between units. The way it works there's a unit of let's say 200 people. Commanders agree that one of them will borrow 50 people and send them to another town to do something, for instance clear a mine field. If they die the unit is still there on paper. They report that 25% was sent to another command and that's it. On paper they're still there in that other unit clearing mines. In reality they're dead. In fact there are dead divisions that still "fight" and hold the line somewhere, but there's only 10% of them still fighting.