-66.42% is the change from 405 to 136
Calculation steps:
[( 136 - 405 ) ÷ 405] x 100 = -66.42%
Formula
Percentage change = [(136 - 405) / 405] x 100
Subtract the new number by the original number
136 - 405 = -269
-269 ÷ 405 = -0.6641975308641975
-0.6641975308641975 x 100 = -66.42%