-81.75% is the change from 515 to 94
Calculation steps:
[( 94 - 515 ) ÷ 515] x 100 = -81.75%
Formula
Percentage change = [(94 - 515) / 515] x 100
Subtract the new number by the original number
94 - 515 = -421
-421 ÷ 515 = -0.8174757281553398
-0.8174757281553398 x 100 = -81.75%