-83.67% is the change from 949 to 155
Calculation steps:
[( 155 - 949 ) ÷ 949] x 100 = -83.67%
Formula
Percentage change = [(155 - 949) / 949] x 100
Subtract the new number by the original number
155 - 949 = -794
-794 ÷ 949 = -0.8366701791359326
-0.8366701791359326 x 100 = -83.67%