-18.25% is the change from 789 to 645
Calculation steps:
[( 645 - 789 ) ÷ 789] x 100 = -18.25%
Formula
Percentage change = [(645 - 789) / 789] x 100
Subtract the new number by the original number
645 - 789 = -144
-144 ÷ 789 = -0.18250950570342206
-0.18250950570342206 x 100 = -18.25%