-86.28% is the change from 634 to 87
Calculation steps:
[( 87 - 634 ) ÷ 634] x 100 = -86.28%
Formula
Percentage change = [(87 - 634) / 634] x 100
Subtract the new number by the original number
87 - 634 = -547
-547 ÷ 634 = -0.862776025236593
-0.862776025236593 x 100 = -86.28%