-38.34% is the change from 845 to 521
Calculation steps:
[( 521 - 845 ) ÷ 845] x 100 = -38.34%
Formula
Percentage change = [(521 - 845) / 845] x 100
Subtract the new number by the original number
521 - 845 = -324
-324 ÷ 845 = -0.3834319526627219
-0.3834319526627219 x 100 = -38.34%