-95.48% is the change from 663 to 30
Calculation steps:
[( 30 - 663 ) ÷ 663] x 100 = -95.48%
Formula
Percentage change = [(30 - 663) / 663] x 100
Subtract the new number by the original number
30 - 663 = -633
-633 ÷ 663 = -0.9547511312217195
-0.9547511312217195 x 100 = -95.48%