-68.4% is the change from 405 to 128
Calculation steps:
[( 128 - 405 ) ÷ 405] x 100 = -68.4%
Formula
Percentage change = [(128 - 405) / 405] x 100
Subtract the new number by the original number
128 - 405 = -277
-277 ÷ 405 = -0.6839506172839506
-0.6839506172839506 x 100 = -68.4%