-68.87% is the change from 636 to 198
Calculation steps:
[( 198 - 636 ) ÷ 636] x 100 = -68.87%
Formula
Percentage change = [(198 - 636) / 636] x 100
Subtract the new number by the original number
198 - 636 = -438
-438 ÷ 636 = -0.6886792452830188
-0.6886792452830188 x 100 = -68.87%