-69.29% is the change from 521 to 160
Calculation steps:
[( 160 - 521 ) ÷ 521] x 100 = -69.29%
Formula
Percentage change = [(160 - 521) / 521] x 100
Subtract the new number by the original number
160 - 521 = -361
-361 ÷ 521 = -0.6928982725527831
-0.6928982725527831 x 100 = -69.29%