-9.2% is the change from 913 to 829
Calculation steps:
[( 829 - 913 ) ÷ 913] x 100 = -9.2%
Formula
Percentage change = [(829 - 913) / 913] x 100
Subtract the new number by the original number
829 - 913 = -84
-84 ÷ 913 = -0.09200438116100766
-0.09200438116100766 x 100 = -9.2%