-70.18% is the change from 456 to 136
Calculation steps:
[( 136 - 456 ) ÷ 456] x 100 = -70.18%
Formula
Percentage change = [(136 - 456) / 456] x 100
Subtract the new number by the original number
136 - 456 = -320
-320 ÷ 456 = -0.7017543859649122
-0.7017543859649122 x 100 = -70.18%