-27.59% is the change from 917 to 664
Calculation steps:
[( 664 - 917 ) ÷ 917] x 100 = -27.59%
Formula
Percentage change = [(664 - 917) / 917] x 100
Subtract the new number by the original number
664 - 917 = -253
-253 ÷ 917 = -0.27589967284623773
-0.27589967284623773 x 100 = -27.59%