-38.27% is the change from 844 to 521
Calculation steps:
[( 521 - 844 ) ÷ 844] x 100 = -38.27%
Formula
Percentage change = [(521 - 844) / 844] x 100
Subtract the new number by the original number
521 - 844 = -323
-323 ÷ 844 = -0.38270142180094785
-0.38270142180094785 x 100 = -38.27%