-62.96% is the change from 521 to 193
Calculation steps:
[( 193 - 521 ) ÷ 521] x 100 = -62.96%
Formula
Percentage change = [(193 - 521) / 521] x 100
Subtract the new number by the original number
193 - 521 = -328
-328 ÷ 521 = -0.6295585412667947
-0.6295585412667947 x 100 = -62.96%