-94.57% is the change from 221 to 12
Calculation steps:
[( 12 - 221 ) ÷ 221] x 100 = -94.57%
Formula
Percentage change = [(12 - 221) / 221] x 100
Subtract the new number by the original number
12 - 221 = -209
-209 ÷ 221 = -0.9457013574660633
-0.9457013574660633 x 100 = -94.57%