-10.53% is the change from 247 to 221
Calculation steps:
[( 221 - 247 ) ÷ 247] x 100 = -10.53%
Formula
Percentage change = [(221 - 247) / 247] x 100
Subtract the new number by the original number
221 - 247 = -26
-26 ÷ 247 = -0.10526315789473684
-0.10526315789473684 x 100 = -10.53%