-56.3% is the change from 810 to 354
Calculation steps:
[( 354 - 810 ) ÷ 810] x 100 = -56.3%
Formula
Percentage change = [(354 - 810) / 810] x 100
Subtract the new number by the original number
354 - 810 = -456
-456 ÷ 810 = -0.562962962962963
-0.562962962962963 x 100 = -56.3%