-96.22% is the change from 661 to 25
Calculation steps:
[( 25 - 661 ) ÷ 661] x 100 = -96.22%
Formula
Percentage change = [(25 - 661) / 661] x 100
Subtract the new number by the original number
25 - 661 = -636
-636 ÷ 661 = -0.962178517397882
-0.962178517397882 x 100 = -96.22%