A correction fraction between one and two overshoots but still damps. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
A correction bigger than one overshoots
Correction 3/2 sends the first state from 0 volts to 12 volts.
0+23(8−(0))=12
The signed error changes direction and shrinks
The checked errors are 8, negative 4, 2, negative 1 volts.