-63.19% is the change from 451 to 166
Calculation steps:
[( 166 - 451 ) ÷ 451] x 100 = -63.19%
Formula
Percentage change = [(166 - 451) / 451] x 100
Subtract the new number by the original number
166 - 451 = -285
-285 ÷ 451 = -0.6319290465631929
-0.6319290465631929 x 100 = -63.19%