-12.54% is the change from 949 to 830
Calculation steps:
[( 830 - 949 ) ÷ 949] x 100 = -12.54%
Formula
Percentage change = [(830 - 949) / 949] x 100
Subtract the new number by the original number
830 - 949 = -119
-119 ÷ 949 = -0.12539515279241306
-0.12539515279241306 x 100 = -12.54%