-89.1% is the change from 156 to 17
Calculation steps:
[( 17 - 156 ) ÷ 156] x 100 = -89.1%
Formula
Percentage change = [(17 - 156) / 156] x 100
Subtract the new number by the original number
17 - 156 = -139
-139 ÷ 156 = -0.8910256410256411
-0.8910256410256411 x 100 = -89.1%