-60.82% is the change from 661 to 259
Calculation steps:
[( 259 - 661 ) ÷ 661] x 100 = -60.82%
Formula
Percentage change = [(259 - 661) / 661] x 100
Subtract the new number by the original number
259 - 661 = -402
-402 ÷ 661 = -0.6081694402420574
-0.6081694402420574 x 100 = -60.82%