-17.41% is the change from 781 to 645
Calculation steps:
[( 645 - 781 ) ÷ 781] x 100 = -17.41%
Formula
Percentage change = [(645 - 781) / 781] x 100
Subtract the new number by the original number
645 - 781 = -136
-136 ÷ 781 = -0.17413572343149808
-0.17413572343149808 x 100 = -17.41%