-92.09% is the change from 834 to 66
Calculation steps:
[( 66 - 834 ) ÷ 834] x 100 = -92.09%
Formula
Percentage change = [(66 - 834) / 834] x 100
Subtract the new number by the original number
66 - 834 = -768
-768 ÷ 834 = -0.920863309352518
-0.920863309352518 x 100 = -92.09%