-93.02% is the change from 917 to 64
Calculation steps:
[( 64 - 917 ) ÷ 917] x 100 = -93.02%
Formula
Percentage change = [(64 - 917) / 917] x 100
Subtract the new number by the original number
64 - 917 = -853
-853 ÷ 917 = -0.9302071973827699
-0.9302071973827699 x 100 = -93.02%