-39.83% is the change from 949 to 571
Calculation steps:
[( 571 - 949 ) ÷ 949] x 100 = -39.83%
Formula
Percentage change = [(571 - 949) / 949] x 100
Subtract the new number by the original number
571 - 949 = -378
-378 ÷ 949 = -0.39831401475237094
-0.39831401475237094 x 100 = -39.83%