-47.98% is the change from 521 to 271
Calculation steps:
[( 271 - 521 ) ÷ 521] x 100 = -47.98%
Formula
Percentage change = [(271 - 521) / 521] x 100
Subtract the new number by the original number
271 - 521 = -250
-250 ÷ 521 = -0.4798464491362764
-0.4798464491362764 x 100 = -47.98%