-25.71% is the change from 210 to 156
Calculation steps:
[( 156 - 210 ) ÷ 210] x 100 = -25.71%
Formula
Percentage change = [(156 - 210) / 210] x 100
Subtract the new number by the original number
156 - 210 = -54
-54 ÷ 210 = -0.2571428571428571
-0.2571428571428571 x 100 = -25.71%