-95.2% is the change from 625 to 30
Calculation steps:
[( 30 - 625 ) ÷ 625] x 100 = -95.2%
Formula
Percentage change = [(30 - 625) / 625] x 100
Subtract the new number by the original number
30 - 625 = -595
-595 ÷ 625 = -0.952
-0.952 x 100 = -95.2%
Example