-66.91% is the change from 810 to 268
Calculation steps:
[( 268 - 810 ) ÷ 810] x 100 = -66.91%
Formula
Percentage change = [(268 - 810) / 810] x 100
Subtract the new number by the original number
268 - 810 = -542
-542 ÷ 810 = -0.6691358024691358
-0.6691358024691358 x 100 = -66.91%