-43.51% is the change from 917 to 518
Calculation steps:
[( 518 - 917 ) ÷ 917] x 100 = -43.51%
Formula
Percentage change = [(518 - 917) / 917] x 100
Subtract the new number by the original number
518 - 917 = -399
-399 ÷ 917 = -0.4351145038167939
-0.4351145038167939 x 100 = -43.51%