-96.37% is the change from 661 to 24
Calculation steps:
[( 24 - 661 ) ÷ 661] x 100 = -96.37%
Formula
Percentage change = [(24 - 661) / 661] x 100
Subtract the new number by the original number
24 - 661 = -637
-637 ÷ 661 = -0.9636913767019667
-0.9636913767019667 x 100 = -96.37%