-92.48% is the change from 851 to 64
Calculation steps:
[( 64 - 851 ) ÷ 851] x 100 = -92.48%
Formula
Percentage change = [(64 - 851) / 851] x 100
Subtract the new number by the original number
64 - 851 = -787
-787 ÷ 851 = -0.9247943595769683
-0.9247943595769683 x 100 = -92.48%