-84.42% is the change from 199 to 31
Calculation steps:
[( 31 - 199 ) ÷ 199] x 100 = -84.42%
Formula
Percentage change = [(31 - 199) / 199] x 100
Subtract the new number by the original number
31 - 199 = -168
-168 ÷ 199 = -0.8442211055276382
-0.8442211055276382 x 100 = -84.42%