-27.7% is the change from 917 to 663
Calculation steps:
[( 663 - 917 ) ÷ 917] x 100 = -27.7%
Formula
Percentage change = [(663 - 917) / 917] x 100
Subtract the new number by the original number
663 - 917 = -254
-254 ÷ 917 = -0.27699018538713194
-0.27699018538713194 x 100 = -27.7%