-15.24% is the change from 210 to 178
Calculation steps:
[( 178 - 210 ) ÷ 210] x 100 = -15.24%
Formula
Percentage change = [(178 - 210) / 210] x 100
Subtract the new number by the original number
178 - 210 = -32
-32 ÷ 210 = -0.1523809523809524
-0.1523809523809524 x 100 = -15.24%