-71.45% is the change from 809 to 231
Calculation steps:
[( 231 - 809 ) ÷ 809] x 100 = -71.45%
Formula
Percentage change = [(231 - 809) / 809] x 100
Subtract the new number by the original number
231 - 809 = -578
-578 ÷ 809 = -0.7144622991347342
-0.7144622991347342 x 100 = -71.45%