-39.45% is the change from 844 to 511
Calculation steps:
[( 511 - 844 ) ÷ 844] x 100 = -39.45%
Formula
Percentage change = [(511 - 844) / 844] x 100
Subtract the new number by the original number
511 - 844 = -333
-333 ÷ 844 = -0.39454976303317535
-0.39454976303317535 x 100 = -39.45%