-65.26% is the change from 521 to 181
Calculation steps:
[( 181 - 521 ) ÷ 521] x 100 = -65.26%
Formula
Percentage change = [(181 - 521) / 521] x 100
Subtract the new number by the original number
181 - 521 = -340
-340 ÷ 521 = -0.6525911708253359
-0.6525911708253359 x 100 = -65.26%