-73.58% is the change from 810 to 214
Calculation steps:
[( 214 - 810 ) ÷ 810] x 100 = -73.58%
Formula
Percentage change = [(214 - 810) / 810] x 100
Subtract the new number by the original number
214 - 810 = -596
-596 ÷ 810 = -0.7358024691358025
-0.7358024691358025 x 100 = -73.58%