-89.02% is the change from 501 to 55
Calculation steps:
[( 55 - 501 ) ÷ 501] x 100 = -89.02%
Formula
Percentage change = [(55 - 501) / 501] x 100
Subtract the new number by the original number
55 - 501 = -446
-446 ÷ 501 = -0.8902195608782435
-0.8902195608782435 x 100 = -89.02%