-64.45% is the change from 661 to 235
Calculation steps:
[( 235 - 661 ) ÷ 661] x 100 = -64.45%
Formula
Percentage change = [(235 - 661) / 661] x 100
Subtract the new number by the original number
235 - 661 = -426
-426 ÷ 661 = -0.6444780635400907
-0.6444780635400907 x 100 = -64.45%