-17.83% is the change from 785 to 645
Calculation steps:
[( 645 - 785 ) ÷ 785] x 100 = -17.83%
Formula
Percentage change = [(645 - 785) / 785] x 100
Subtract the new number by the original number
645 - 785 = -140
-140 ÷ 785 = -0.17834394904458598
-0.17834394904458598 x 100 = -17.83%