-23.34% is the change from 827 to 634
Calculation steps:
[( 634 - 827 ) ÷ 827] x 100 = -23.34%
Formula
Percentage change = [(634 - 827) / 827] x 100
Subtract the new number by the original number
634 - 827 = -193
-193 ÷ 827 = -0.23337363966142685
-0.23337363966142685 x 100 = -23.34%