-77.74% is the change from 521 to 116
Calculation steps:
[( 116 - 521 ) ÷ 521] x 100 = -77.74%
Formula
Percentage change = [(116 - 521) / 521] x 100
Subtract the new number by the original number
116 - 521 = -405
-405 ÷ 521 = -0.7773512476007678
-0.7773512476007678 x 100 = -77.74%