-23.5% is the change from 864 to 661
Calculation steps:
[( 661 - 864 ) ÷ 864] x 100 = -23.5%
Formula
Percentage change = [(661 - 864) / 864] x 100
Subtract the new number by the original number
661 - 864 = -203
-203 ÷ 864 = -0.2349537037037037
-0.2349537037037037 x 100 = -23.5%