-26.3% is the change from 810 to 597
Calculation steps:
[( 597 - 810 ) ÷ 810] x 100 = -26.3%
Formula
Percentage change = [(597 - 810) / 810] x 100
Subtract the new number by the original number
597 - 810 = -213
-213 ÷ 810 = -0.26296296296296295
-0.26296296296296295 x 100 = -26.3%