-42.03% is the change from 521 to 302
Calculation steps:
[( 302 - 521 ) ÷ 521] x 100 = -42.03%
Formula
Percentage change = [(302 - 521) / 521] x 100
Subtract the new number by the original number
302 - 521 = -219
-219 ÷ 521 = -0.42034548944337813
-0.42034548944337813 x 100 = -42.03%