-28.57% is the change from 210 to 150
Calculation steps:
[( 150 - 210 ) ÷ 210] x 100 = -28.57%
Formula
Percentage change = [(150 - 210) / 210] x 100
Subtract the new number by the original number
150 - 210 = -60
-60 ÷ 210 = -0.2857142857142857
-0.2857142857142857 x 100 = -28.57%