-90.95% is the change from 917 to 83
Calculation steps:
[( 83 - 917 ) ÷ 917] x 100 = -90.95%
Formula
Percentage change = [(83 - 917) / 917] x 100
Subtract the new number by the original number
83 - 917 = -834
-834 ÷ 917 = -0.9094874591057798
-0.9094874591057798 x 100 = -90.95%