-80.12% is the change from 508 to 101
Calculation steps:
[( 101 - 508 ) ÷ 508] x 100 = -80.12%
Formula
Percentage change = [(101 - 508) / 508] x 100
Subtract the new number by the original number
101 - 508 = -407
-407 ÷ 508 = -0.8011811023622047
-0.8011811023622047 x 100 = -80.12%