-17.94% is the change from 786 to 645
Calculation steps:
[( 645 - 786 ) ÷ 786] x 100 = -17.94%
Formula
Percentage change = [(645 - 786) / 786] x 100
Subtract the new number by the original number
645 - 786 = -141
-141 ÷ 786 = -0.17938931297709923
-0.17938931297709923 x 100 = -17.94%