-87.15% is the change from 506 to 65
Calculation steps:
[( 65 - 506 ) ÷ 506] x 100 = -87.15%
Formula
Percentage change = [(65 - 506) / 506] x 100
Subtract the new number by the original number
65 - 506 = -441
-441 ÷ 506 = -0.8715415019762845
-0.8715415019762845 x 100 = -87.15%