-35.89% is the change from 521 to 334
Calculation steps:
[( 334 - 521 ) ÷ 521] x 100 = -35.89%
Formula
Percentage change = [(334 - 521) / 521] x 100
Subtract the new number by the original number
334 - 521 = -187
-187 ÷ 521 = -0.35892514395393477
-0.35892514395393477 x 100 = -35.89%