-84.22% is the change from 507 to 80
Calculation steps:
[( 80 - 507 ) ÷ 507] x 100 = -84.22%
Formula
Percentage change = [(80 - 507) / 507] x 100
Subtract the new number by the original number
80 - 507 = -427
-427 ÷ 507 = -0.8422090729783037
-0.8422090729783037 x 100 = -84.22%