-21.24% is the change from 805 to 634
Calculation steps:
[( 634 - 805 ) ÷ 805] x 100 = -21.24%
Formula
Percentage change = [(634 - 805) / 805] x 100
Subtract the new number by the original number
634 - 805 = -171
-171 ÷ 805 = -0.2124223602484472
-0.2124223602484472 x 100 = -21.24%