-50.38% is the change from 917 to 455
Calculation steps:
[( 455 - 917 ) ÷ 917] x 100 = -50.38%
Formula
Percentage change = [(455 - 917) / 917] x 100
Subtract the new number by the original number
455 - 917 = -462
-462 ÷ 917 = -0.5038167938931297
-0.5038167938931297 x 100 = -50.38%