-43.19% is the change from 521 to 296
Calculation steps:
[( 296 - 521 ) ÷ 521] x 100 = -43.19%
Formula
Percentage change = [(296 - 521) / 521] x 100
Subtract the new number by the original number
296 - 521 = -225
-225 ÷ 521 = -0.43186180422264875
-0.43186180422264875 x 100 = -43.19%