-97.47% is the change from 990 to 25
Calculation steps:
[( 25 - 990 ) ÷ 990] x 100 = -97.47%
Formula
Percentage change = [(25 - 990) / 990] x 100
Subtract the new number by the original number
25 - 990 = -965
-965 ÷ 990 = -0.9747474747474747
-0.9747474747474747 x 100 = -97.47%