-93.24% is the change from 222 to 15
Calculation steps:
[( 15 - 222 ) ÷ 222] x 100 = -93.24%
Formula
Percentage change = [(15 - 222) / 222] x 100
Subtract the new number by the original number
15 - 222 = -207
-207 ÷ 222 = -0.9324324324324325
-0.9324324324324325 x 100 = -93.24%