-12.3% is the change from 252 to 221
Calculation steps:
[( 221 - 252 ) ÷ 252] x 100 = -12.3%
Formula
Percentage change = [(221 - 252) / 252] x 100
Subtract the new number by the original number
221 - 252 = -31
-31 ÷ 252 = -0.12301587301587301
-0.12301587301587301 x 100 = -12.3%