-99.56% is the change from 917 to 4
Calculation steps:
[( 4 - 917 ) ÷ 917] x 100 = -99.56%
Formula
Percentage change = [(4 - 917) / 917] x 100
Subtract the new number by the original number
4 - 917 = -913
-913 ÷ 917 = -0.9956379498364231
-0.9956379498364231 x 100 = -99.56%