-89.04% is the change from 502 to 55
Calculation steps:
[( 55 - 502 ) ÷ 502] x 100 = -89.04%
Formula
Percentage change = [(55 - 502) / 502] x 100
Subtract the new number by the original number
55 - 502 = -447
-447 ÷ 502 = -0.8904382470119522
-0.8904382470119522 x 100 = -89.04%