-17.93% is the change from 781 to 641
Calculation steps:
[( 641 - 781 ) ÷ 781] x 100 = -17.93%
Formula
Percentage change = [(641 - 781) / 781] x 100
Subtract the new number by the original number
641 - 781 = -140
-140 ÷ 781 = -0.1792573623559539
-0.1792573623559539 x 100 = -17.93%