-94.26% is the change from 523 to 30
Calculation steps:
[( 30 - 523 ) ÷ 523] x 100 = -94.26%
Formula
Percentage change = [(30 - 523) / 523] x 100
Subtract the new number by the original number
30 - 523 = -493
-493 ÷ 523 = -0.9426386233269598
-0.9426386233269598 x 100 = -94.26%