-30.86% is the change from 324 to 224
Calculation steps:
[( 224 - 324 ) ÷ 324] x 100 = -30.86%
Formula
Percentage change = [(224 - 324) / 324] x 100
Subtract the new number by the original number
224 - 324 = -100
-100 ÷ 324 = -0.30864197530864196
-0.30864197530864196 x 100 = -30.86%