-86.18% is the change from 521 to 72
Calculation steps:
[( 72 - 521 ) ÷ 521] x 100 = -86.18%
Formula
Percentage change = [(72 - 521) / 521] x 100
Subtract the new number by the original number
72 - 521 = -449
-449 ÷ 521 = -0.8618042226487524
-0.8618042226487524 x 100 = -86.18%