-33.81% is the change from 210 to 139
Calculation steps:
[( 139 - 210 ) ÷ 210] x 100 = -33.81%
Formula
Percentage change = [(139 - 210) / 210] x 100
Subtract the new number by the original number
139 - 210 = -71
-71 ÷ 210 = -0.3380952380952381
-0.3380952380952381 x 100 = -33.81%