-48.59% is the change from 994 to 511
Calculation steps:
[( 511 - 994 ) ÷ 994] x 100 = -48.59%
Formula
Percentage change = [(511 - 994) / 994] x 100
Subtract the new number by the original number
511 - 994 = -483
-483 ÷ 994 = -0.4859154929577465
-0.4859154929577465 x 100 = -48.59%