-72.92% is the change from 949 to 257
Calculation steps:
[( 257 - 949 ) ÷ 949] x 100 = -72.92%
Formula
Percentage change = [(257 - 949) / 949] x 100
Subtract the new number by the original number
257 - 949 = -692
-692 ÷ 949 = -0.7291886195995785
-0.7291886195995785 x 100 = -72.92%