-19.91% is the change from 221 to 177
Calculation steps:
[( 177 - 221 ) ÷ 221] x 100 = -19.91%
Formula
Percentage change = [(177 - 221) / 221] x 100
Subtract the new number by the original number
177 - 221 = -44
-44 ÷ 221 = -0.19909502262443438
-0.19909502262443438 x 100 = -19.91%