-33.58% is the change from 810 to 538
Calculation steps:
[( 538 - 810 ) ÷ 810] x 100 = -33.58%
Formula
Percentage change = [(538 - 810) / 810] x 100
Subtract the new number by the original number
538 - 810 = -272
-272 ÷ 810 = -0.3358024691358025
-0.3358024691358025 x 100 = -33.58%