-95.28% is the change from 636 to 30
Calculation steps:
[( 30 - 636 ) ÷ 636] x 100 = -95.28%
Formula
Percentage change = [(30 - 636) / 636] x 100
Subtract the new number by the original number
30 - 636 = -606
-606 ÷ 636 = -0.9528301886792453
-0.9528301886792453 x 100 = -95.28%