-37.12% is the change from 827 to 520
Calculation steps:
[( 520 - 827 ) ÷ 827] x 100 = -37.12%
Formula
Percentage change = [(520 - 827) / 827] x 100
Subtract the new number by the original number
520 - 827 = -307
-307 ÷ 827 = -0.37122128174123337
-0.37122128174123337 x 100 = -37.12%