-92.36% is the change from 838 to 64
Calculation steps:
[( 64 - 838 ) ÷ 838] x 100 = -92.36%
Formula
Percentage change = [(64 - 838) / 838] x 100
Subtract the new number by the original number
64 - 838 = -774
-774 ÷ 838 = -0.9236276849642004
-0.9236276849642004 x 100 = -92.36%