-30.71% is the change from 635 to 440
Calculation steps:
[( 440 - 635 ) ÷ 635] x 100 = -30.71%
Formula
Percentage change = [(440 - 635) / 635] x 100
Subtract the new number by the original number
440 - 635 = -195
-195 ÷ 635 = -0.30708661417322836
-0.30708661417322836 x 100 = -30.71%