-31.16% is the change from 661 to 455
Calculation steps:
[( 455 - 661 ) ÷ 661] x 100 = -31.16%
Formula
Percentage change = [(455 - 661) / 661] x 100
Subtract the new number by the original number
455 - 661 = -206
-206 ÷ 661 = -0.31164901664145234
-0.31164901664145234 x 100 = -31.16%