-92.02% is the change from 188 to 15
Calculation steps:
[( 15 - 188 ) ÷ 188] x 100 = -92.02%
Formula
Percentage change = [(15 - 188) / 188] x 100
Subtract the new number by the original number
15 - 188 = -173
-173 ÷ 188 = -0.9202127659574468
-0.9202127659574468 x 100 = -92.02%