-87.72% is the change from 635 to 78
Calculation steps:
[( 78 - 635 ) ÷ 635] x 100 = -87.72%
Formula
Percentage change = [(78 - 635) / 635] x 100
Subtract the new number by the original number
78 - 635 = -557
-557 ÷ 635 = -0.8771653543307086
-0.8771653543307086 x 100 = -87.72%