-99.85% is the change from 663 to 1
Calculation steps:
[( 1 - 663 ) ÷ 663] x 100 = -99.85%
Formula
Percentage change = [(1 - 663) / 663] x 100
Subtract the new number by the original number
1 - 663 = -662
-662 ÷ 663 = -0.9984917043740573
-0.9984917043740573 x 100 = -99.85%