-27.6% is the change from 221 to 160
Calculation steps:
[( 160 - 221 ) ÷ 221] x 100 = -27.6%
Formula
Percentage change = [(160 - 221) / 221] x 100
Subtract the new number by the original number
160 - 221 = -61
-61 ÷ 221 = -0.27601809954751133
-0.27601809954751133 x 100 = -27.6%