-52.5% is the change from 600 to 285
Calculation steps:
[( 285 - 600 ) ÷ 600] x 100 = -52.5%
Formula
Percentage change = [(285 - 600) / 600] x 100
Subtract the new number by the original number
285 - 600 = -315
-315 ÷ 600 = -0.525
-0.525 x 100 = -52.5%