-99.85% is the change from 678 to 1
Calculation steps:
[( 1 - 678 ) ÷ 678] x 100 = -99.85%
Formula
Percentage change = [(1 - 678) / 678] x 100
Subtract the new number by the original number
1 - 678 = -677
-677 ÷ 678 = -0.9985250737463127
-0.9985250737463127 x 100 = -99.85%