-9.42% is the change from 711 to 644
Calculation steps:
[( 644 - 711 ) ÷ 711] x 100 = -9.42%
Formula
Percentage change = [(644 - 711) / 711] x 100
Subtract the new number by the original number
644 - 711 = -67
-67 ÷ 711 = -0.09423347398030943
-0.09423347398030943 x 100 = -9.42%