78.13% is the change from 224 to 399
Calculation steps:
[( 399 - 224 ) ÷ 224] x 100 = 78.13%
Formula
Percentage change = [(399 - 224) / 224] x 100
Subtract the new number by the original number
399 - 224 = 175
175 ÷ 224 = 0.78125
0.78125 x 100 = 78.13%