-87.23% is the change from 423 to 54
Calculation steps:
[( 54 - 423 ) ÷ 423] x 100 = -87.23%
Formula
Percentage change = [(54 - 423) / 423] x 100
Subtract the new number by the original number
54 - 423 = -369
-369 ÷ 423 = -0.8723404255319149
-0.8723404255319149 x 100 = -87.23%