-45.4% is the change from 511 to 279
Calculation steps:
[( 279 - 511 ) ÷ 511] x 100 = -45.4%
Formula
Percentage change = [(279 - 511) / 511] x 100
Subtract the new number by the original number
279 - 511 = -232
-232 ÷ 511 = -0.45401174168297453
-0.45401174168297453 x 100 = -45.4%