-19.54% is the change from 261 to 210
Calculation steps:
[( 210 - 261 ) ÷ 261] x 100 = -19.54%
Formula
Percentage change = [(210 - 261) / 261] x 100
Subtract the new number by the original number
210 - 261 = -51
-51 ÷ 261 = -0.19540229885057472
-0.19540229885057472 x 100 = -19.54%