-88.17% is the change from 837 to 99
Calculation steps:
[( 99 - 837 ) ÷ 837] x 100 = -88.17%
Formula
Percentage change = [(99 - 837) / 837] x 100
Subtract the new number by the original number
99 - 837 = -738
-738 ÷ 837 = -0.8817204301075269
-0.8817204301075269 x 100 = -88.17%