-95.36% is the change from 647 to 30
Calculation steps:
[( 30 - 647 ) ÷ 647] x 100 = -95.36%
Formula
Percentage change = [(30 - 647) / 647] x 100
Subtract the new number by the original number
30 - 647 = -617
-617 ÷ 647 = -0.9536321483771252
-0.9536321483771252 x 100 = -95.36%