-86.45% is the change from 406 to 55
Calculation steps:
[( 55 - 406 ) ÷ 406] x 100 = -86.45%
Formula
Percentage change = [(55 - 406) / 406] x 100
Subtract the new number by the original number
55 - 406 = -351
-351 ÷ 406 = -0.8645320197044335
-0.8645320197044335 x 100 = -86.45%