-27.84% is the change from 291 to 210
Calculation steps:
[( 210 - 291 ) ÷ 291] x 100 = -27.84%
Formula
Percentage change = [(210 - 291) / 291] x 100
Subtract the new number by the original number
210 - 291 = -81
-81 ÷ 291 = -0.27835051546391754
-0.27835051546391754 x 100 = -27.84%