-71.57% is the change from 904 to 257
Calculation steps:
[( 257 - 904 ) ÷ 904] x 100 = -71.57%
Formula
Percentage change = [(257 - 904) / 904] x 100
Subtract the new number by the original number
257 - 904 = -647
-647 ÷ 904 = -0.7157079646017699
-0.7157079646017699 x 100 = -71.57%