-87.18% is the change from 507 to 65
Calculation steps:
[( 65 - 507 ) ÷ 507] x 100 = -87.18%
Formula
Percentage change = [(65 - 507) / 507] x 100
Subtract the new number by the original number
65 - 507 = -442
-442 ÷ 507 = -0.8717948717948718
-0.8717948717948718 x 100 = -87.18%