-81.9% is the change from 210 to 38
Calculation steps:
[( 38 - 210 ) ÷ 210] x 100 = -81.9%
Formula
Percentage change = [(38 - 210) / 210] x 100
Subtract the new number by the original number
38 - 210 = -172
-172 ÷ 210 = -0.819047619047619
-0.819047619047619 x 100 = -81.9%