-19.46% is the change from 221 to 178
Calculation steps:
[( 178 - 221 ) ÷ 221] x 100 = -19.46%
Formula
Percentage change = [(178 - 221) / 221] x 100
Subtract the new number by the original number
178 - 221 = -43
-43 ÷ 221 = -0.19457013574660634
-0.19457013574660634 x 100 = -19.46%