-87.43% is the change from 167 to 21
Calculation steps:
[( 21 - 167 ) ÷ 167] x 100 = -87.43%
Formula
Percentage change = [(21 - 167) / 167] x 100
Subtract the new number by the original number
21 - 167 = -146
-146 ÷ 167 = -0.874251497005988
-0.874251497005988 x 100 = -87.43%