-93.85% is the change from 829 to 51
Calculation steps:
[( 51 - 829 ) ÷ 829] x 100 = -93.85%
Formula
Percentage change = [(51 - 829) / 829] x 100
Subtract the new number by the original number
51 - 829 = -778
-778 ÷ 829 = -0.9384800965018094
-0.9384800965018094 x 100 = -93.85%