-91.97% is the change from 523 to 42
Calculation steps:
[( 42 - 523 ) ÷ 523] x 100 = -91.97%
Formula
Percentage change = [(42 - 523) / 523] x 100
Subtract the new number by the original number
42 - 523 = -481
-481 ÷ 523 = -0.9196940726577438
-0.9196940726577438 x 100 = -91.97%