-26.32% is the change from 285 to 210
Calculation steps:
[( 210 - 285 ) ÷ 285] x 100 = -26.32%
Formula
Percentage change = [(210 - 285) / 285] x 100
Subtract the new number by the original number
210 - 285 = -75
-75 ÷ 285 = -0.2631578947368421
-0.2631578947368421 x 100 = -26.32%