-77.17% is the change from 635 to 145
Calculation steps:
[( 145 - 635 ) ÷ 635] x 100 = -77.17%
Formula
Percentage change = [(145 - 635) / 635] x 100
Subtract the new number by the original number
145 - 635 = -490
-490 ÷ 635 = -0.7716535433070866
-0.7716535433070866 x 100 = -77.17%