-50.49% is the change from 917 to 454
Calculation steps:
[( 454 - 917 ) ÷ 917] x 100 = -50.49%
Formula
Percentage change = [(454 - 917) / 917] x 100
Subtract the new number by the original number
454 - 917 = -463
-463 ÷ 917 = -0.504907306434024
-0.504907306434024 x 100 = -50.49%