-71.62% is the change from 814 to 231
Calculation steps:
[( 231 - 814 ) ÷ 814] x 100 = -71.62%
Formula
Percentage change = [(231 - 814) / 814] x 100
Subtract the new number by the original number
231 - 814 = -583
-583 ÷ 814 = -0.7162162162162162
-0.7162162162162162 x 100 = -71.62%