-39.2% is the change from 949 to 577
Calculation steps:
[( 577 - 949 ) ÷ 949] x 100 = -39.2%
Formula
Percentage change = [(577 - 949) / 949] x 100
Subtract the new number by the original number
577 - 949 = -372
-372 ÷ 949 = -0.39199157007376184
-0.39199157007376184 x 100 = -39.2%