-76.86% is the change from 523 to 121
Calculation steps:
[( 121 - 523 ) ÷ 523] x 100 = -76.86%
Formula
Percentage change = [(121 - 523) / 523] x 100
Subtract the new number by the original number
121 - 523 = -402
-402 ÷ 523 = -0.768642447418738
-0.768642447418738 x 100 = -76.86%