-9.78% is the change from 716 to 646
Calculation steps:
[( 646 - 716 ) ÷ 716] x 100 = -9.78%
Formula
Percentage change = [(646 - 716) / 716] x 100
Subtract the new number by the original number
646 - 716 = -70
-70 ÷ 716 = -0.09776536312849161
-0.09776536312849161 x 100 = -9.78%