-71.73% is the change from 810 to 229
Calculation steps:
[( 229 - 810 ) ÷ 810] x 100 = -71.73%
Formula
Percentage change = [(229 - 810) / 810] x 100
Subtract the new number by the original number
229 - 810 = -581
-581 ÷ 810 = -0.717283950617284
-0.717283950617284 x 100 = -71.73%