-95.93% is the change from 516 to 21
Calculation steps:
[( 21 - 516 ) ÷ 516] x 100 = -95.93%
Formula
Percentage change = [(21 - 516) / 516] x 100
Subtract the new number by the original number
21 - 516 = -495
-495 ÷ 516 = -0.9593023255813954
-0.9593023255813954 x 100 = -95.93%