-53.5% is the change from 600 to 279
Calculation steps:
[( 279 - 600 ) ÷ 600] x 100 = -53.5%
Formula
Percentage change = [(279 - 600) / 600] x 100
Subtract the new number by the original number
279 - 600 = -321
-321 ÷ 600 = -0.535
-0.535 x 100 = -53.5%