-43.04% is the change from 388 to 221
Calculation steps:
[( 221 - 388 ) ÷ 388] x 100 = -43.04%
Formula
Percentage change = [(221 - 388) / 388] x 100
Subtract the new number by the original number
221 - 388 = -167
-167 ÷ 388 = -0.43041237113402064
-0.43041237113402064 x 100 = -43.04%