-92.29% is the change from 999 to 77
Calculation steps:
[( 77 - 999 ) ÷ 999] x 100 = -92.29%
Formula
Percentage change = [(77 - 999) / 999] x 100
Subtract the new number by the original number
77 - 999 = -922
-922 ÷ 999 = -0.9229229229229229
-0.9229229229229229 x 100 = -92.29%