-92.06% is the change from 189 to 15
Calculation steps:
[( 15 - 189 ) ÷ 189] x 100 = -92.06%
Formula
Percentage change = [(15 - 189) / 189] x 100
Subtract the new number by the original number
15 - 189 = -174
-174 ÷ 189 = -0.9206349206349206
-0.9206349206349206 x 100 = -92.06%