-16.3% is the change from 810 to 678
Calculation steps:
[( 678 - 810 ) ÷ 810] x 100 = -16.3%
Formula
Percentage change = [(678 - 810) / 810] x 100
Subtract the new number by the original number
678 - 810 = -132
-132 ÷ 810 = -0.16296296296296298
-0.16296296296296298 x 100 = -16.3%