-86.57% is the change from 402 to 54
Calculation steps:
[( 54 - 402 ) ÷ 402] x 100 = -86.57%
Formula
Percentage change = [(54 - 402) / 402] x 100
Subtract the new number by the original number
54 - 402 = -348
-348 ÷ 402 = -0.8656716417910447
-0.8656716417910447 x 100 = -86.57%