-99.88% is the change from 854 to 1
Calculation steps:
[( 1 - 854 ) ÷ 854] x 100 = -99.88%
Formula
Percentage change = [(1 - 854) / 854] x 100
Subtract the new number by the original number
1 - 854 = -853
-853 ÷ 854 = -0.9988290398126464
-0.9988290398126464 x 100 = -99.88%