-28.79% is the change from 521 to 371
Calculation steps:
[( 371 - 521 ) ÷ 521] x 100 = -28.79%
Formula
Percentage change = [(371 - 521) / 521] x 100
Subtract the new number by the original number
371 - 521 = -150
-150 ÷ 521 = -0.28790786948176583
-0.28790786948176583 x 100 = -28.79%