-27.3% is the change from 304 to 221
Calculation steps:
[( 221 - 304 ) ÷ 304] x 100 = -27.3%
Formula
Percentage change = [(221 - 304) / 304] x 100
Subtract the new number by the original number
221 - 304 = -83
-83 ÷ 304 = -0.2730263157894737
-0.2730263157894737 x 100 = -27.3%