-13.12% is the change from 221 to 192
Calculation steps:
[( 192 - 221 ) ÷ 221] x 100 = -13.12%
Formula
Percentage change = [(192 - 221) / 221] x 100
Subtract the new number by the original number
192 - 221 = -29
-29 ÷ 221 = -0.13122171945701358
-0.13122171945701358 x 100 = -13.12%