-83.84% is the change from 631 to 102
Calculation steps:
[( 102 - 631 ) ÷ 631] x 100 = -83.84%
Formula
Percentage change = [(102 - 631) / 631] x 100
Subtract the new number by the original number
102 - 631 = -529
-529 ÷ 631 = -0.838351822503962
-0.838351822503962 x 100 = -83.84%