-47.53% is the change from 993 to 521
Calculation steps:
[( 521 - 993 ) ÷ 993] x 100 = -47.53%
Formula
Percentage change = [(521 - 993) / 993] x 100
Subtract the new number by the original number
521 - 993 = -472
-472 ÷ 993 = -0.47532729103726085
-0.47532729103726085 x 100 = -47.53%