-89.15% is the change from 507 to 55
Calculation steps:
[( 55 - 507 ) ÷ 507] x 100 = -89.15%
Formula
Percentage change = [(55 - 507) / 507] x 100
Subtract the new number by the original number
55 - 507 = -452
-452 ÷ 507 = -0.8915187376725838
-0.8915187376725838 x 100 = -89.15%