-92.33% is the change from 834 to 64
Calculation steps:
[( 64 - 834 ) ÷ 834] x 100 = -92.33%
Formula
Percentage change = [(64 - 834) / 834] x 100
Subtract the new number by the original number
64 - 834 = -770
-770 ÷ 834 = -0.9232613908872902
-0.9232613908872902 x 100 = -92.33%