-58.3% is the change from 669 to 279
Calculation steps:
[( 279 - 669 ) ÷ 669] x 100 = -58.3%
Formula
Percentage change = [(279 - 669) / 669] x 100
Subtract the new number by the original number
279 - 669 = -390
-390 ÷ 669 = -0.5829596412556054
-0.5829596412556054 x 100 = -58.3%