-36.12% is the change from 814 to 520
Calculation steps:
[( 520 - 814 ) ÷ 814] x 100 = -36.12%
Formula
Percentage change = [(520 - 814) / 814] x 100
Subtract the new number by the original number
520 - 814 = -294
-294 ÷ 814 = -0.36117936117936117
-0.36117936117936117 x 100 = -36.12%