-47.91% is the change from 981 to 511
Calculation steps:
[( 511 - 981 ) ÷ 981] x 100 = -47.91%
Formula
Percentage change = [(511 - 981) / 981] x 100
Subtract the new number by the original number
511 - 981 = -470
-470 ÷ 981 = -0.47910295616717635
-0.47910295616717635 x 100 = -47.91%